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Summary of Contents for Motoplat CV-014DS
- Page 1 2016.09.07 Motoplat CV-014DS TESTER FOR DIAGNOSTICS OF ALTERNATOR STATOR WINDINGS AND DIODE BRIDGES USER MANUAL...
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Page 3: Table Of Contents
User Manual - Tester CONTENTS 1. DESCRIPTION ............................... 2. TECHNICAL CHARACTERISTICS ........................5 3. CONTROL UNITS ..............................4. ALTERNATOR STATOR WINDINGS TESTING ....................4.1 General Information ..........................4.2 Stator Windings Most Common Failures.................... 4.3 Stator Windings Testing Mode Operation ..................5. ALTERNATOR DIODE BRIDGES TESTING ......................5.1 General Information ............................... -
Page 4: Description
User Manual - Tester 1. DESCRIPTION Motoplat CV-014DS Tester combines two devices: diagnostic tester of stator windings and diode bridges of alternators. The device has small dimensions and a light weight, it was developed according to the requirements of actual service stations. The feature of the tester is diagnostics of stator windings and diode bridges with no additional testing and measuring devices. -
Page 5: Technical Characteristics
User Manual - Tester 2. TECHNICAL CHARACTERISTICS Supply voltage, V 100-250 Supply frequency, Hz 50/60 Supply type Single-phase Maximum consuming power, W Dimensions, mm 219*214*80 Weight, kg Stator windings testing Voltage, V 12/24 Types ‘Star’, ‘delta’ - Inter-turn fault - Inter-phase fault Detected failures - Phases to alternator body - Open-phase fault... -
Page 6: Control Units
User Manual - Tester 3. CONTROL UNITS Fig. 1. Tester – Front panel The tester is performed in black metallic frame with inclined front panel, made of stainless steel. The front panel (Fig.1.) consists of: 1 - connection ports to connect tested stator windings or diode bridges and stator windings through 1-6 connecting cables (included in the tester set);... -
Page 7: Alternator Stator Windings Testing
User Manual - Tester The back panel (Fig. 2) consists of: 1 - mains cable connection slot; 2 - fuse (2A). 4. ALTERNATOR STATOR WINDING TESTING 4.1 General Information Stator is a fixed element of electric unit, interacting with its moving part, the rotor. It consists of magnetically conductive core with coil windings fixed circle-wise. - Page 8 User Manual - Tester Three-phase stator winding consists of three separate windings, called phase windings or simply phases, wound in a certain order on the magnetic core. Current phases in the windings are displaced by one third of a period respectively one another, i.e. by 120 degrees (Fig. 4). Fig.
- Page 9 User Manual - Tester Fig. 6. Stator, windings are connected through ‘delta’ diagram Fig. 7. Stator, windings are connected through ‘star’ diagram...
- Page 10 User Manual - Tester Fig. 8. Stator, windings are connected through ‘star’ diagram with center point Fig. 9. Stator, windings are connected through ‘star’ or ‘delta’ diagram with jumpers in alternator diode bridge...
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Page 11: Stator Windings Most Common Failures
User Manual - Tester 4.2 Stator Windings Most Common Failures • Inter-turn fault (single-phase short circuit): a) alternator overload – alternator operation mode, when alternator current exceeds the limit, thus, stator windings overheat. Overheating causes damage of winding insulation, thus, inter-turn fault arises;... - Page 12 User Manual - Tester Stator testing mode menu appears on the display (Fig. 11). Fig. 11. Stator testing mode menu Connect stator winding terminals to 1,2,3,4,5,6 connection ports. There is no need to observe polarity and order, the tester detects connected windings automatically. In case when the stator has 3 outputs (connection diagram: ‘star without center point’...
- Page 13 User Manual - Tester Make sure that the ‘crocodile’ type connector contact to windings terminals is safe and of low ohmic resistance (on detecting connection of windings, pulse current exceeds 20A), otherwise, connection is not found. In case when the stator has 6 outputs (connection diagram: ‘star’ or ‘delta’, commutating in alternator diode bridge), connect 6 cables and press Scan.
- Page 14 User Manual - Tester When 3 windings are found, press Test button. The tester measures windings. The measured values (Fig. 15) are displayed on the screen, where: • Pins: numbers of terminals to which the measured winding is connected; • Q, units: winging inductance (displayed in nominal units); •...
- Page 15 User Manual - Tester Fig. 16. Tested stator winding CONCLUSION: Stator winding failure. 1% difference between the phases which corresponds to the acceptable limits (10%). Winding insulation is broken, 5-6 phase short circuited to the magnetic core body. When the tester detects the decrease of winding insulation resistance to stator magnetic core (lower than 12 kOhm), resistance value in kiloohm is displayed in Isol.
- Page 16 User Manual - Tester Such connection is not a fault, disconnect center point for convenience in estimation of measured values. Further sequence of actions is the same as when testing the windings through ‘star’ diagram without center point. When measuring, the risk of losing contact with winding is possible. The notification break (Fig.
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Page 17: Alternator Diode Bridges Testing
User Manual - Tester 5. ALTERNATOR DIODE BRIDGES TESTING 5.1 General Information Diode rectifier block on three parallel half-bridges (on six semiconductor diodes) converts three-phase alternating current of the stator into direct current (rather in unidirectional pulsating current) at the output of alternator unit. A common diagram of rectifier on three parallel half-bridges is presented in the Fig. -
Page 18: Diode Bridges Most Common Failures
User Manual - Tester Assembled alternator diode bridge is presented in the Fig. 21 (F00M 33218 diode bridge, manufactured by BOSCH), where: 1 – alternator diodes 2 – positive heat sink 3 – negative heat sink Diode bridges can be divided into 2 types by construction: I) diodes are pressed (sometimes soldered) into rectifier heat sink plates;... - Page 19 User Manual - Tester Fig. 22. Diode bridges testing menu Description in the frames when testing diode bridges: • connection: diode bridge topology display frame; • FREE: disconnected measuring cables option frame; • OPEN CIRCUIT: diode bridge elements under open circuit option frame; •...
- Page 20 User Manual - Tester Then press Test button. The device tests the connected diode bridge and displays the results on the screen. Faultless three-armed diode bridge testing is presented in the Fig. 23. Measuring cables 1,2,3,5,6 are connected, cable 4 is disconnected. Faultless three-armed diode bridge testing is presented in the Fig.
- Page 21 User Manual - Tester Testing of a diode bridge in failure (bus open circuit В-) is presented in the Fig. 26. Fig. 26. Diode bridge in failure – open circuit Testing of a diode bridge in failure (one element bus open circuit) is presented in the Fig. 27. Measuring cables, connected to the element under open circuit, are displayed in OPEN CIRCUIT.
- Page 22 User Manual - Tester Fig. 28. Diode bridge in failure – short circuit WARNING! If a diode bridge has more than 6 leads (such diode bridge has purposely electrically connected leads, serving for commutation of stator windings into set diagram), closed leads must be detected, only one of them must be used for connection of measuring cables (only one lead out of a pair of closed leads).
- Page 23 Service & Support Pos Service Holland BV N.Stremmelaar Stichtsekade 47C 1244NV 's Graveland The Netherlands Email: nardo@psh.nl Tel.0031653332341...
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