Table of Contents
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maxon motor control
Operating Instructions
The DEC (Digital EC Controller) is a 1-quadrant amplifier for controlling electronically commutated (brushless)
DC motors.
• Digital speed control
• Maximum speed: 120 000 rpm (motor with 1 pole pair)
• Operates as speed control, current control or open loop
speed control
• /Brake, direction and /disable input
• AUX connection: adjustable function
(+5 V output or input for changing speed)
• Status indicator with red and green LED
• Set value input through built-in potentiometer (several
speed ranges can be selected) or through
analogue set value input (0 ... +5 V)
• Maximum current limit adjustable
• Gain can be adjusted in two stages
• Adjustable speed ramp
• Protection against heat overload
• Blockage protection (current limit for blocked motor)
• Plug-in terminal clamp
Table of Contents
1 Safety Instructions ..............................................................................................................................................2
2 Performance Data ..............................................................................................................................................3
3 Minimum External Wiring for Different Modes of Operation...............................................................................4
4 Operating Instructions ........................................................................................................................................6
5 Inputs and Outputs .............................................................................................................................................8
6 Switch Functions ..............................................................................................................................................12
7 Speed Ranges..................................................................................................................................................12
8 Potentiometer Functions...................................................................................................................................13
9 Operating Status Display..................................................................................................................................14
10 Protection .........................................................................................................................................................15
11 EMC-compliant installation...............................................................................................................................15
12 Block Diagram ..................................................................................................................................................16
13 Dimension Drawing ..........................................................................................................................................16
The latest edition of these operating instructions may be found in the internet as a PDF-file under
www.maxonmotor.com
maxon motor
category "Service & Downloads", Order number 230572.
1-Q-EC Amplifier DEC 50/5
Order number 230572
October 2008 Edition
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Summary of Contents for maxon motor 1-Q-EC
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Page 1: Table Of Contents
1-Q-EC Amplifier DEC 50/5 Order number 230572 Operating Instructions October 2008 Edition The DEC (Digital EC Controller) is a 1-quadrant amplifier for controlling electronically commutated (brushless) DC motors. • Digital speed control • Maximum speed: 120 000 rpm (motor with 1 pole pair) •... -
Page 2: Safety Instructions
1-Q-EC Amplifier DEC 50/5 Operating Instructions Safety Instructions Skilled Personnel Only experienced, skilled personnel should install and start the equipment. Statutory regulations The user must ensure that the amplifier and the components belonging to it are assembled and connected according to local statutory regulations. -
Page 3: Performance Data
Operating Instructions 1-Q-EC Amplifier DEC 50/5 Performance Data 2.1 Electrical data Supply voltage V (Ripple < 5 %)................10 - 50 VDC Max. output voltage......................0.95 · V Continuous output current I ....................5 A cont Max. output current I ......................10 A... -
Page 4: Minimum External Wiring For Different Modes Of Operation
1-Q-EC Amplifier DEC 50/5 Operating Instructions Minimum External Wiring for Different Modes of Operation 3.1 Speed control maxon motor control October 2008 Edition / Doc.No. 544910-06 / subject to change... - Page 5 Operating Instructions 1-Q-EC Amplifier DEC 50/5 3.2 Current control and open loop speed control October 2008 Edition / Doc.No. 544910-06 / subject to change maxon motor control...
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Page 6: Operating Instructions
1-Q-EC Amplifier DEC 50/5 Operating Instructions Operating Instructions 4.1 Power supply layout Any available power supply can be used, as long as it meets the minimum re- quirements set out below. During set up and adjustment phases, we recommend separating the motor mechanically from the machine to prevent damage from uncontrolled motion. - Page 7 Operating Instructions 1-Q-EC Amplifier DEC 50/5 4.2 Adjusting the potentiometers 4.2.1 Pre-adjustment With the pre-adjustment, the potentiometers are set in a preferred position. DEC units in the original packing are already pre-set. Pre-adjustment of potentiometers Speed 1 50 %...
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Page 8: Inputs And Outputs
1-Q-EC Amplifier DEC 50/5 Operating Instructions Inputs and Outputs 5.1 Inputs 5.1.1 Set value “Speed” The analogue set value is predetermined at the “Speed” input. The set value input is used for the following operating modes: speed control, current control and open loop speed control. - Page 9 Operating Instructions 1-Q-EC Amplifier DEC 50/5 5.1.3 “Direction” When the level changes, the motor slows down in an uncontrolled fashion (as windings are short-circuited, see also chapter 5.1.5, “/Brake” function) and accelerates in the opposite direction, until the nominal speed is reached again.
- Page 10 1-Q-EC Amplifier DEC 50/5 Operating Instructions 5.1.5 “/Brake” function If the input is not wired or the applied voltage is greater than 2.4 V, the /brake function is deactivated. If the input is placed at Gnd-potential or the applied voltage is lower than 0.8 V, the /brake function is activated and the motor shaft slows down to a halt, short- circuiting the motor windings.
- Page 11 Operating Instructions 1-Q-EC Amplifier DEC 50/5 5.1.6 “AUX” The “AUX” terminal can be used as input or output, depending on the switch position. The “AUX” terminal is only protected against overvoltage if switch S1 is open. Switch S1 closed...
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Page 12: Switch Functions
1-Q-EC Amplifier DEC 50/5 Operating Instructions Switch Functions Speed Ranges In the speed control mode the set value range (0 ... +5 V) is equal to the fol- lowing speed ranges: Type of motor Switch S5 and S6... -
Page 13: Potentiometer Functions
Operating Instructions 1-Q-EC Amplifier DEC 50/5 Potentiometer Functions The following table shows which potentiometer is active in which operating mode. Mode Speed control Open loop Current control (closed loop) speed control Function of poten- tiometers Speed 1 Speed 2 Ramp October 2008 Edition / Doc.No. -
Page 14: Operating Status Display
1-Q-EC Amplifier DEC 50/5 Operating Instructions Operating Status Display Red and green LEDs show the operating status. Definition LED on LED off 9.1 No LED Reason: • No supply voltage • Fuse blown • Wrong polarity of supply voltage •... -
Page 15: Protection
Operating Instructions 1-Q-EC Amplifier DEC 50/5 10 Protection 10.1 Protection against heat overload If the power stage temperature exceeds a limit of around 100°C for longer than 1.5 s, the output stage is switched off. The error mode is shown in diagram form (see chapter 9 “Operating Status... -
Page 16: Block Diagram
1-Q-EC Amplifier DEC 50/5 Operating Instructions 12 Block Diagram Case Ground +7...+12V Safety Earth Supply earth Hall Sensor 1 optional +V 10...50V Power Ground Hall Sensor 2 Power MOSFET Motor winding 1 Driver 3-phase brigde Motor winding 2...
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