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Veichi AC310 Service Manual

Universal ac drive
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AC310 Universal AC Drive Service Manual
AC310 Universal AC Drive Service Manual
(Veichi Electric Technical Service Department)
(Note 1: This maintenance manual related circuit diagrams, using the AC310 series
2.2KW machine as a reference, the control board screen printing diagrams and other
power segments of the power board different points, in the appendix will be prompted,
the appendix according to each power segment circuit is divided into 3 power segments,
each power segment select a specific power segment.
There will be tips in the appendix, the appendix according to the different circuits in
each power section, roughly divided into three power sections, each power section to
select a specific power as a practical example to explain the differences and similarities,
details.
(Note 2: AC310 general-purpose AC drive is still in the process of continuous
optimisation of the hardware circuit, so sometimes there may be inconsistencies
between the specifications of the actual components and the specifications on the circuit
diagram.
(Note 3: This service manual involves hardware design circuit diagrams, and should
not be distributed privately.)

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  • Page 1 (Note 2: AC310 general-purpose AC drive is still in the process of continuous optimisation of the hardware circuit, so sometimes there may be inconsistencies between the specifications of the actual components and the specifications on the circuit diagram.

  • Page 2: Table Of Contents

    AC310 Universal AC Drive Service Manual Catalog Chapter 1 Summarize ........................ 3 1.1 The Working Principle of the AC Drive ................. 3 1.1.1 Rectifier Bridge ......................3 1.1.2 Detachable Capacitor....................4 1.1.3 Switching Mode Power Supply ................4 1.1.4 Inverter Module ......................4 1.2 Common Device Overhaul Method .................
  • Page 3 AC310 Universal AC Drive Service Manual 3.4.2 Analogue Output Signal（AO1, AO2）:Voltage 0-10V; Current 4-20mA ,0- 20mA;Frequency Signal 0-50KHZ ................38 3.5 RS485 Communication Circuit ..................41 3.6 Drive Signal Processing Circuit ..................44 3.7 Keyboard Circuitry ......................46 3.7.1 Keypad Key Circuit: ....................47 3.7.2 Keypad Display Circuit ..................

  • Page 4: Chapter 1 Summarize

    AC310 Universal AC Drive Service Manual Chapter 1 Summarize 1.1 The Working Principle of the AC Drive The working principle of the AC drive is shown in Fig. 1, the input of the AC drive is AC, which is rectified by the rectifier bridge composed of six diodes and filtered into DC by capacitor C.

  • Page 5: Detachable Capacitor

    AC310 Universal AC Drive Service Manual = 1.414 × 380 = 538V 1.1.2 Detachable Capacitor Electrolytic capacitors in the AC drive is the main role of filtering, filtering capacitors are connected in parallel at the output of the rectifier power supply circuit, to reduce the AC pulsating ripple coefficient, smooth the DC output of a kind of energy storage device;...

  • Page 6: Common Device Overhaul Method

    AC310 Universal AC Drive Service Manual 1.2 Common Device Overhaul Method 1.2.1 Detect Diode Digital multimeter diode file open-circuit voltage of about 2.8V, the red pen is connected to the positive, the black pen is connected to the negative, the measurement of the current provided by about 1mA, the display value for the diode forward voltage drop approximation, the unit is mV or V.

  • Page 7: Optocoupler

    AC310 Universal AC Drive Service Manual drop of about 0.7V is a silicon tube, and the one with a voltage drop of about 0.3V is a germanium tube. 1.2.3 Optocoupler The circuit principle and symbols of commonly used optocouplers are shown in...

  • Page 8: Static Measurements Of Ac Drive Continuity Diodes

    AC310 Universal AC Drive Service Manual 1.2.5 Static Measurements of AC Drive Continuity Diodes Schematic diagram of the AC drive unit, the measurement method is the same as ordinary diodes. Measurement of the IGBT diode to determine the damage. Just put a meter pen into the U, V, W output, a meter pen on the P or N, you can measure the good or bad.

  • Page 9: Chapter 2 Testing And Repairing Of Power Supply Boards

    AC310 Universal AC Drive Service Manual Chapter 2 Testing and Repairing of Power Supply Boards 2.1 Driver Circuit 1. Circuit components driver circuit According to the received DSP drive signal to control the switch of IGBT, optocoupler primary drive signal sampling interlocking form. ACPL-W314 drive optocoupler minimum...
  • Page 10 AC310 Universal AC Drive Service Manual capability. Due to the bootstrap topology does not have a negative voltage, the need to shorten the shutdown time to ensure that the dead zone, drive to increase a shutdown loop, shutdown After the diode is on, the driver resistor is connected in parallel.
  • Page 11 AC310 Universal AC Drive Service Manual Black pen AC file 8-9V 8-9V 8-9V 8-9V 8-9V Single measurement 8.03V 8.01V 8.20V 8.20V 8.20V measurement When the drive voltage is at a positive value, the drive is turned on, and at a negative...
  • Page 12 AC310 Universal AC Drive Service Manual 4. Damage-prone devices Driver optocoupler, voltage regulator 5. Device bit number and specification Driver Resistors Gate Resistor/Capacitor R126=R127=R128=R129=R130=R131=68R0 R43/R54/R61/R68/R47/R55=1002/080 /1206 Voltage regulator Driver Optocoupler R42=R50=R60=R67=R46=R53=1000/1206 C41/C45/C49/C52/C43/C47=472/0805 BZT52C16 ACPL-W314-500E Z2/Z3/Z4/Z5/Z6/Z7/Z8/Z9/Z10/Z11/Z12/Z13 O40/O42/O44/O45/O41/O43 Thyristor Other MBR0540T1G D40/D42/D44/D45/D41/D43...

  • Page 13: Brake Driver Circuit

    AC310 Universal AC Drive Service Manual 2.2 Brake Driver Circuit 1. Circuit composition Isolation photocoupler, transistor, voltage regulator 2. Fault type: Overvoltage fault, braking resistor burned out, module damage 3, overhaul mode Static detection According to the appendix provides a variety of device detection methods for overhaul, but also need to test the braking circuit of the brake diode is good or bad.
  • Page 14 AC310 Universal AC Drive Service Manual tube driver Brake circuit schematic: The braking resistor is connected between PB and PJ when the voltage between GBRK and N is about 16 V. Refer to the selection manual for the braking resistor.

  • Page 15: Current Detection Circuit

    AC310 Universal AC Drive Service Manual 2.3 Current Detection Circuit 1. Circuit composition ACS720 current chip is used for sampling, the chip outputs 1.5V bias voltage with zero current and provides a 1.5V REF. The sampling signal is calculated by the operational amplifier and sent to the control board.
  • Page 16 AC310 Universal AC Drive Service Manual current reaches the set overcurrent point, which is connected to the FAU pin to protect the system from SC; and using the slow protection pins VOC_S and FAULT_S/, the corresponding OC signal is pulled low, causing the COLSE signal to go high and blocking the outputs.

  • Page 17: Busbar Voltage Detection Circuit

    AC310 Universal AC Drive Service Manual 2.4 Busbar Voltage Detection Circuit 1. Circuit composition The bus voltage sampling circuit is a high-resistance isolation circuit that utilizes multiple resistors in series for isolation and then differential amplification by operational amplifiers. 2. Fault type Inaccurate bus voltage display, overvoltage, undervoltage 3.
  • Page 18 AC310 Universal AC Drive Service Manual 1. Use the DC adjustable voltage regulator to connect to the P-N terminal of the machine under test, and hang the multimeter pen on the P-N, and set the multimeter to DC voltage (DC); note that the software voltage correction factor is 100% before testing. Compare the value displayed by multimeter and keyboard 2.

  • Page 19: Relay Control Circuit

    AC310 Universal AC Drive Service Manual 2.5 Relay Control Circuit 1. Circuit composition Controls the 24V power switch according to the received DSP drive signal to control the relay to close and disconnect 2. Failure type Operation undervoltage, soft start resistor burned out, no vibration 3.
  • Page 20 AC310 Universal AC Drive Service Manual (RCE level changes from high to low, the main relay is disconnected), when undervoltage, the signal source from CPU changes from low level to high level (5V). After normal power-on, check whether the primary side of the optocoupler is about 0.5V, and whether the secondary side and COM voltage is 24V, if both are normal, then...

  • Page 21: Fan Control Circuit

    According to the received DSP drive signal, through the optocoupler output, drive MOS tube control fan 24V power output. Compared with the previous fan drive, if the fan of AC310 AC drive is short-circuited, the software will reboot itself twice, combined with the fail-safe function F10.14, it will report the fault E.040, and other switching power supply voltages will not be affected.
  • Page 22 AC310 Universal AC Drive Service Manual ⚫ Detect the relay according to the various device detection methods provided in the appendix for overhaul. Note: The fan circuit is driven by a MOS tube (Q2), so it is necessary to focus on detecting the static value of the MOS tube (Q2).

  • Page 23: Switching Power Supply

    AC310 Universal AC Drive Service Manual 2.7 Switching Power Supply...
  • Page 24 AC310 Universal AC Drive Service Manual Switching power supply circuits Switching power supply circuits 1. Circuit descriptions Item Design specifications Unit VDR/16. Rated output voltage of winding Output voltage range 5.05~4.95 14.25~15.75 -14.25~- 15.7~17. 22.8~25.2 15.75 Load current 2. Fault type Driver output abnormality, fan abnormality, relay non-suction, no display on power, etc.
  • Page 25 AC310 Universal AC Drive Service Manual MOS tube static measurement Diode range 0.494 0.661 2. Each output diode Dynamic detection Measure both ends of the capacitor through the voltage range of a multimeter ⚫ Check the power output of each circuit ⚫...
  • Page 26 AC310 Universal AC Drive Service Manual the diode is the VCC auxiliary power supply circuit diode. This diode is the diode on the circuit of the VCC auxiliary power supply. ⚫ In the past, the switching power supply at the majority of problems, UC3844, MOS tubes, voltage regulators, diode 4.
  • Page 27 AC310 Universal AC Drive Service Manual 1UF/0805 Diode: D4/D15=US1M Optocoupler: O1=EL250IS D5=BAV99LFIG Controllable precision voltage regulator: U2 = TL431AIDBZR...

  • Page 28: Chapter 3 Ac300Con-A1.0 Control Board Introduction And Brief Detection And Maintenance

    AC310 Universal AC Drive Service Manual Chapter 3 AC300CON-A1.0 Control Board Introduction and Brief Detection and Maintenance 3.1 Summary of IC Related Information Bit number Name Control Information Specification O9, O1, O3, General Multi-function terminals X1-X5 EL3H4 02, O4 Optocoupler...

  • Page 29: Access To Voltage Points On The Control Board

    AC310 Universal AC Drive Service Manual Octal Driver Y, Relay, Fan, Contactor, Brake SN74ACT244PWR Outputs Logic Chips Keypad Logic Chip 74HC595D Keypad CPU XMC1100- T016F0032 3.2 Access to Voltage Points on the Control Board C41/C18/82/89/C95=2.2UF /0402 U17=AMS1117-3.3 Resistor: R45/R51/R30=1K/0805， R20=10K/0402, R271=14.04K...
  • Page 30 AC310 Universal AC Drive Service Manual Capacitors: C83/C88=100NF/0402, C87=2.2UF/0603 Resistors: R25/R205=20K/0402， R164=2K/0402, R201=12K/0402, R165=10K/0402 Triode：Q1=2S C2873 Front side 6VREF circuit Backside +10V Voltage circuit...
  • Page 31 AC310 Universal AC Drive Service Manual Backside REF-H REF-L circuit Backside REF-H2 REF-L2 circuit ⚫ Output detection at each voltage point: Measure the voltage value of each circuit with a multimeter at DC level. Control board backside Red Pen 3V3D...
  • Page 32 AC310 Universal AC Drive Service Manual ⚫ There are reference voltages on the control board: REF6V, REF3V. REF6V is converted from 15V, REF6V provides voltage references for OC and CBC, i.e., REF-H, REF-L, REF-H2, REF-L2, and REF3V is converted from REF6V (i.e., this voltage). REF3V is converted from REF6V (i.e., if there is a problem with this output voltage, the OC fault...

  • Page 33: Detection And Maintenance Optocoupler Unit Circuits

    AC310 Universal AC Drive Service Manual 3.3 Detection and Maintenance Optocoupler Unit Circuits 1. Circuit descriptions ⚫ Function: External multi-function terminal inputs and outputs are optically isolated from the internal signals of the control board. ⚫ Ordinary Optocoupler: EL3H7 (relay, Y output); EL3H4 (5-way X input), PUL input and ordinary input X5 multiplexed.

  • Page 34: Input Circuit Detection And Maintenance

    AC310 Universal AC Drive Service Manual Relay output circuit +5V signal 2. Type of fault Terminal input and output signals are not normal, signal command action is abnormal 3. Inspection Methods See Optocoupler and Triode Inspection Methods, and Inspection Resistors for inspection methods.

  • Page 35: Y Output Detection And Maintenance

    AC310 Universal AC Drive Service Manual Optocoupler Resistances O9、O1、O3、O2、O4=EL3H4 R6/R7/R16/R17/R26/R27/R11/R12/R1/R2=2.2 Capacitors k/0805 R8/R18/R28/R13/R3=2K/0402 C3/C7/C11/C5/C1=100nf/ R9/R19/R29/R14/R4=12K/0402 0402 C4/C8/C31/C6/C2=1nf/04 3.3.2 Y Output Detection and Maintenance 1. After power on, use multimeter DC voltage to measure the voltage of Y port to COM, the voltage is below 1V is qualified;...

  • Page 36: Analogue Signal Detection And Maintenance

    AC310 Universal AC Drive Service Manual 3.4 Analogue Signal Detection and Maintenance 3.4.1 Analogue Input Signal Test (AI1, AI2): Voltage 0-10V; Current 0-20mA...
  • Page 37 AC310 Universal AC Drive Service Manual ⚫ To test the 0-10V input voltage function (with the dip-switch set to the voltage input of AI1 or AI2): use a potentiometer with +10V, AI1 or AI2 and GND connected to each pin of potentiometer 3, rotate the potentiometer and check C00.16 or C00.17.
  • Page 38 AC310 Universal AC Drive Service Manual (3) Device bit number and specification Op amp: U20-A=LF353DRG4 Inductor: L2=0603/FBMA160808 Resistor: R166=100K/0402, R58/R68=1K/0402, R78=2K/0402, R60=510Ω/0402 R74/ R75/ R76/ R77=2K/0402 SMD Dual Diode: D6/D7=BAV99LT1G Capacitor:C29/C33=100NF/0402, C106=10NF/0402, C34=1NF, C30=220NF/0402 Op-amp: U20-B=LF353DRG4 Inductor: L4 = 0603/FBMA160808 Resistors: R69=100K/0402, R62/R64=1K/0402, R65=2K/0402, R66=510Ω/0402...

  • Page 39: Analogue Output Signal（Ao1, Ao2）:Voltage 0-10V; Current 4-20Ma ,0

    AC310 Universal AC Drive Service Manual 3.4.2 Analogue Output Signal （AO1, AO2） : Voltage 0-10V; Current 4-20mA ,0-20mA; Frequency Signal 0 -50KHZ ⚫ Test the output voltage: DIP switch to A01 or AO2 voltage ON terminal, at this time parameter setting F03.37=0, F03.38=1, check C00.20 or C00.21, then press the start button, there will be voltage from 0-10V (after parameter setting or use multimeter DC gear, measure +10V).
  • Page 40 AC310 Universal AC Drive Service Manual frequency). ⚫ Test the output current: DIP switch to A01 or AO2 current ON terminal, at this time, parameter setting F03.37=1 or 2, F03.38=1, check C00.20 or C00.21, then press the start button, there will be a current from 4-20mA or 0-20mA.
  • Page 41 AC310 Universal AC Drive Service Manual Note 2: The data measured at this point is the default AO output voltage. 9 pin 5 pin 3 pin 1.2V 1.6V 13.1V 10 pin 6 pin 2 pin 1.2V 1.6V 11.5V 8 pin...

  • Page 42: Rs485 Communication Circuit

    AC310 Universal AC Drive Service Manual 3.5 RS485 Communication Circuit 1. Circuit description RS485 Communication Circuit Maximum through- current 230mA, DC impedance 1.0Ω RS485 communication is a typical half-duplex communication. With SP485EEN-L as the core and its peripheral circuits, up to 32 machines can communicate. 。...
  • Page 43 AC310 Universal AC Drive Service Manual Input TXD1 signal from CPU TXD1 side TXD1 Differential signal A+ processed by SP485EEN-L Output TXD1 Differential signal B- after SP485EEN-L processing side Voltage difference between transmitter AB: +2V ~ +6V: Logic positive level voltage...
  • Page 44 AC310 Universal AC Drive Service Manual ⚫ Communication master (parameter Fd.00 is 1, Fd.09 is 0022), slave (parameter Fd.00 bit 0, F0.02 is 2, F0.03 is 6), change the frequency of the master, the frequency on the slave is synchronised with the master signal ⚫...

  • Page 45: Drive Signal Processing Circuit

    AC310 Universal AC Drive Service Manual Common Mode Inductors L1=WCM-453228-510YT01（Maximum permissible current 230mA） TSS Tube D4/D5=WES806S， Breakdown voltage: 6.67~7.37V Resistances R39/R41=5.6K/0805，R42/R43=10K/0402，R92/R179=62Ω R46/R47/R48=4.7K Capacitors C14/C15=1NF/0402，C19=100NF/0402，C24=2.2UF/10V 3.6 Drive Signal Processing Circuit 1. Circuit Description:...
  • Page 46 AC310 Universal AC Drive Service Manual This module is mainly used for shaping the seven drive signals from the CPU and enhancing the drive capability of the drive signals to provide suitable drive waves for the IGBT module. In the event of a fault, the CLOSE signal output from the hardware blocking circuit of the system fault becomes high, resulting in no output from the drive signal processing circuit, which leads to blocking of the drive and protection of the machine.

  • Page 47: Keyboard Circuitry

    AC310 Universal AC Drive Service Manual 3.7 Keyboard Circuitry...

  • Page 48: Keypad Key Circuit

    AC310 Universal AC Drive Service Manual 3.7.1 Keypad Key Circuit: AC300CON1-V1.0 keypad adopts the analogue amplitude detection method to realize the...

  • Page 49: Keypad Display Circuit

    AC310 Universal AC Drive Service Manual key identification function. Pressing different keys generates different voltages, so that the CPU (the CPU (U13) is the keypad CPU, which is different from the CPU of the control board) can read which key is working, and the corresponding digital tube can display the corresponding value;...
  • Page 50 AC310 Universal AC Drive Service Manual Digital tube repair in accordance with the above digital tube connection diagram and diode repair can be judged good or bad. The U2 in this circuit is an 8-bit 3-state shift register/output latch chip, check whether the ⚫...
  • Page 51 AC310 Universal AC Drive Service Manual Resistor: R217=2K/0402，R126=4.7K/0402，triode: Q3 U13 command circuit Pushbutton S2 Circuit: Resistor: R235=2K/0402，R219=4.7K/0402，triode: Q4 Pushbutton S3 Circuit: Resistor: R237=2K/0402，R236=4.7K/0402，triode: Q5 Pushbutton S4 Circuit: Resistor: R240=2K/0402，R239=4.7K/0402，triode: Q6 Pushbutton S5 Circuit: Resistor: R257=2K/0402，R256=4.7K/0402，triode: Q7 Pushbutton S6 Circuit: Resistor: R259=2K/0402，R258=4.7K/0402，triode: Q8...

  • Page 52: Vpn Detection And Maintenance

    AC310 Universal AC Drive Service Manual 3.8 VPN Detection and Maintenance C50 10NF/0402 Red pen VPN-IN Black pen GND1 T2 model: Bus voltage 579V corresponds to 5V DSP Input Voltage Range - Voltage range） 0.3V to 4.6V T3 model: bus voltage 1000V corresponds to 5V 1.

  • Page 53: Oh Fault Detection And Maintenance

    AC310 Universal AC Drive Service Manual 3.9 OH Fault Detection and Maintenance 1. GND1 as a reference ground, measuring HEAT, the normal voltage is 0.5V-1V. If the HEAT voltage is abnormal, the power board voltage detection circuit is abnormal, test the power board voltage detection circuit.

  • Page 54: Current Acquisition Detection And Maintenance

    AC310 Universal AC Drive Service Manual 3.10 Current Acquisition Detection and Maintenance...

  • Page 55: Oc Fault Detection And Maintenance

    AC310 Universal AC Drive Service Manual 3.11 OC Fault Detection and Maintenance...
  • Page 56 AC310 Universal AC Drive Service Manual 1. Circuit description: in the OC detection circuit, OC threshold for the rated current 2.7 times, in the circuit used in the comparator U7, U8, U9, the comparator provides the reference voltage REF-H, REF-L, the collection of the current IU, IV, IW into the resistor has a voltage, compared with the reference voltage, when between the two benchmarks, will not report a fault, beyond the benchmark will report fault OC.

  • Page 57: Wave-By-Wave Current Limit Comparison Circuit

    AC310 Universal AC Drive Service Manual 3.12 Wave-by-Wave Current Limit Comparison Circuit 1. Circuit description: In the AC drive wave-by-wave current limiting (CBC) is very...
  • Page 58 AC310 Universal AC Drive Service Manual important, wave-by-wave current limiting can effectively prevent overcurrent, whether it is a short-circuit or a sudden change in the current of the load suddenly added, when the current reaches the wave-by-wave current limiting point, blocking the drive signal, so as to shut down the drive to realize the overcurrent protection of the IGBT, so as to ensure that the IGBT will not be damaged by overcurrent.

  • Page 59: Chapter 4. Common Faults Quick Maintenance

    AC310 Universal AC Drive Service Manual Chapter 4. Common Faults Quick Maintenance (Note: All control signals are processed by the CPU. If the CPU is damaged or does not work, it will cause a malfunction, so after eliminating other malfunctions, finally check whether there is a problem with the CPU).

  • Page 60: Power-Up Or Operating Undervoltage (L.u.1, E.lu2), Overvoltage (E.ou1/2/3/4) Fault

    AC310 Universal AC Drive Service Manual switching power supply, which will lead to no display, so, when there is no display, test whether the 0Ω resistor is normal 4.2 Power-up or Operating Undervoltage (L.U.1, E.LU2), Overvoltage (E.OU1/2/3/4) Fault The power supply is added to the normal voltage value (380VAC/510VDC), and the undervoltage fault is still displayed.

  • Page 61: E.sc Fault

    AC310 Universal AC Drive Service Manual Measurement method: Measure according to the measurement method of IGBT module Solution: Replace the IGBT module. 2. Failure of the current detection circuit on the power supply board Cause: Failure of the circuit (failure of the current detection chip, Hall device, current detection resistor circuit), which causes the collected current to fail, causing the CPU to make incorrect judgment.

  • Page 62: Oh Fault

    AC310 Universal AC Drive Service Manual 4.5 OH Fault 1. The fan is blocked; the fan does not rotate or the speed is too low. Checking method: Check with the normal fan, or use a speed tester to measure. If the...

  • Page 63: Current Detection Fault (E.hal)

    AC310 Universal AC Drive Service Manual Solution: Repair according to the driving circuit of the power supply board. 2. Whether the driving circuit on the control board is abnormal. Cause: If there is a problem with one phase of the driving circuit on the control board, resulting in no voltage output on the power supply board, the fault will be reported.

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