Mining machine
Patent
·
OSTI ID:6155074
A mining machine includes drive unit means for driving a haulage winch and a cutting tool of the machine, the drive unit means comprising a multi-phase induction motor with a wound rotor. In order to control the motor speed, the motor is provided with a circuit connected across the rotor windings and means for varying the effective impedance presented by the said circuit to the rotor windings.
- Assignee:
- Dresser Europe S.A.
- Patent Number(s):
- US 4140951
- OSTI ID:
- 6155074
- Country of Publication:
- United States
- Language:
- English
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