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Construction of PMDC Motor
These are permanent magnet direct current motors having replaceable carbon brushes.
The RPM available are 3000/1500 and with gearbox, speed can be very low. Depending upon requirement for the connection, motors have lead wires or terminal box.
Suitable for continuous operation. The speed of PMDC motor is proportional to voltage. It can be reduce by decreasing supply voltage. In case the motor stops rotation for any reason while the supply is connected, a large current flows through it as winding resistence is very low. This increases the temperature and results in burning of motor.
PMDC Motor With Round Shaft
PMDC Motor With Gear Box
Material Construction:
| Motor Body, Gear Box Body | Steel Alloy |
| Gear Box Body | Aluminium |
| Flange, End Flange | Aluminium |
| Armature Lamination | Silicon Steel |
| Commutator | Copper |
| Shaft, Output Shaft | Steel Alloy |
| Base Plate | Sheet Metal |
| Pinion, Gear | Steel Alloy, Teeth Hardened |
Motor Coding:
Gearbox Coding:
General Specifications:
| Item | Specification |
|---|---|
| Insulation Resistance | 100 MΩ or more when 500 VDC is applied between the winding to winding and the motor body. |
| Temperature Rise | Measured up to 60°C or less using the resistance change method after rated operation under normal ambient temperature and humidity. |
| Insulation Class | F Class (155°C) |
| Operating Ambient Temperature | -10 ~ +40°C (non freezing) |
| Operating Ambient Humidity | 85% or less (Non-condensing) |
| Degree of Protection | Lead Wire Type: IP 20 Terminal Box Type: IP 54 |