Drive unit for an elevator
First Claim
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1. A drive unit for an elevator comprising:
- a pair of spaced apart bearing end-plates mounted on a machine frame, each of said bearing end-plates retaining an associated bearing;
a pair of electric motors, each said motor supported by an associated one of said bearing end-plates;
a shaft having opposed free ends, said shaft being rotatably supported by said bearings, each of said free ends of said shaft being drivingly connected to an associated one of said motors; and
a traction sheave supported by said shaft for rotation by said motors.
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Abstract
An elevator drive unit including a traction sheave supported by a shaft rotatably supported by a pair of bearings. Mounted on opposite free ends of the shaft are rotors of a pair of electric motors. Cage-housings on a pair of spaced bearing end-plates retain the stators of the motors. A plurality of frequency converters operating in a master/slave mode to supply electrical power to the motors.
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Citations
14 Claims
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1. A drive unit for an elevator comprising:
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a pair of spaced apart bearing end-plates mounted on a machine frame, each of said bearing end-plates retaining an associated bearing;
a pair of electric motors, each said motor supported by an associated one of said bearing end-plates;
a shaft having opposed free ends, said shaft being rotatably supported by said bearings, each of said free ends of said shaft being drivingly connected to an associated one of said motors; and
a traction sheave supported by said shaft for rotation by said motors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A drive unit for an elevator comprising:
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a pair of spaced apart bearing end-plates mounted on a machine frame, each of said bearing end-plates retaining an associated bearing;
a pair of electric motors, each said motor supported by an associated one of said bearing end-plates;
a shaft having opposed free ends, said shaft being rotatably supported by said bearings, each of said free ends of said shaft being drivingly connected to an associated one of said motors;
a traction sheave supported by said shaft for rotation by said motors; and
a plurality of frequency converters connected to said motors and operating in a master/slave mode. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification