ep ICE301B, Руководство по обслуживанию

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36
REV. 09/2020
37
REV. 09/2020
DRIVING SYSTEM DRIVING SYSTEM
4 4
4.2 Drive Motor
This truck obtains drive force through AC motor.
4.2.1 Removal and Installation
Drive Motor
Removal
Drive motor is mounted on the gearbox.
- Power off the truck and remove the key;
- Remove the cushion and open the floorboard;
- Remove U, V and W cables on the drive
motor;
- Disconnect the connection between the drive
motor and main wiring cables;
Installation
- Install according to the reverse order of rem-
oval.
- Motor gear should fully engage with the gear
within the gearbox, rotate the gearbox without
blocking, and then fix it with five screws.
CAUTION
Before going on with the next step, please fix
the drive motor properly first. Be sure to avoid
the falling of motor during removal, resulting in
personal injury.
CAUTION
-
Unscrew the five bolts (1), remove the drive
motor (2) from the gearbox (3);
4.2.3 Checking and Testing
U, V, W Terminals
- Identify if the motor windings are normal
through measuring the resistance of U-V, V-W,
and U-W respectively, if there is short circuit
or breakage;
as shown in the following table:
Due to the small size of windings, when measu-
ring with a multimeter, put it on a low resistance
range.
Resistance
Measurement
Judgment
With readings,
but very low
Normal *
0 Ω
Winding internal short circuit
(replace the motor)
∞
Ω
Winding internal open circuit
(replace the motor)
* The difference between the resistance values
measured at U-V, V-W and U-W shall not be
greater than 2%.
CAUTION
- Identify if there is leakage current through
measuring the resistance between U, V, W
and motor housing respectively.
as shown in the following table:
Resistance
Measurement
Judgment
0 Ω
Leakage current
(replace the motor)
∞
Ω Normal
*
* For normal motor, U, V and W terminals are
insulated from motor housing.