Control device without a speed sensor for controlling speed of a rotating machine driving an elevator
First Claim
1. A control device for controlling speed of a rotating machine driving an elevator without using a speed sensor, the control device comprising:
- speed command signal generating means for generating a rotational speed command for the rotating machine; and
speed sensor-less control means for controlling a voltage applied to the rotating machine without using the speed sensor, based on the rotational speed command issued from the speed command signal generating means, wherein the speed command signal generating means changes an acceleration running curve in a deceleration interval in accordance with a moving direction and a load of a car of the elevator to generate the rotational speed command.
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Accused Products
Abstract
A control device for a rotating machine driving an elevator suppresses increases in the moving time of the elevator while securing control and stability in accordance with moving direction and load of a car of the elevator. A control device for controlling speed of the rotating machine without using a speed sensor includes a speed command signal generator for generating a rotational speed command for the rotating machine; and a speed sensor-less controller for controlling a voltage applied to the rotating machine without using a speed sensor, based on the rotational speed command from the speed command signal generator. In the control device, the speed command signal generator changes an acceleration running curve in a deceleration interval in accordance with the moving direction and the load of the car of the elevator to generate the rotational speed command.
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Citations
13 Claims
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1. A control device for controlling speed of a rotating machine driving an elevator without using a speed sensor, the control device comprising:
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speed command signal generating means for generating a rotational speed command for the rotating machine; and speed sensor-less control means for controlling a voltage applied to the rotating machine without using the speed sensor, based on the rotational speed command issued from the speed command signal generating means, wherein the speed command signal generating means changes an acceleration running curve in a deceleration interval in accordance with a moving direction and a load of a car of the elevator to generate the rotational speed command. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13)
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7. A control device for controlling speed of a rotating machine driving an elevator without using a speed sensor, the control device comprising:
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speed command signal generating means for generating a rotational speed command for the rotating machine; speed sensor-less control means for controlling a voltage applied to the rotating machine without using a speed sensor, based on the rotational speed command from the speed command signal generating means; and a brake for applying a braking torque to the rotating machine, wherein the speed sensor-less control means makes the braking torque of the brake effective to compensate for a deficiency in regenerative torque in a deceleration interval in accordance with moving direction and load of a car of the elevator so that a constant acceleration running curve is obtained, regardless of the load of the car.
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Specification