System and method for operating a soft starter in conjunction with a single to three phase static converter
First Claim
1. A motor controller system comprising:
- solid state switches for connection between a single phase to three phase static converter and motor terminals for controlling application of three phase power to the motor;
sensors for sensing power from the static converter; and
a control connected to the sensors and the solid state switches for controlling operation of the solid state switches to run the motor, the control including a three phase detection scheme for preventing operation of the solid state switches in the absence of desired three phase power from the static converter, and a motor start scheme for disabling the three phase detection scheme for a select time after a motor run signal.
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Accused Products
Abstract
A motor controller system comprises solid state switches for connection between a single phase to three phase static converter and motor terminals for controlling application of three phase power to the motor. Sensors sense power from the static converter. A control is connected to the sensors and the solid state switches for controlling operation of the solid state switches to run the motor. The controller includes a three phase detection scheme for preventing operation of the solid state switches in the absence of desired three phase power from the static converter. A motor start scheme disables the three phase detection scheme for a select time after a motor run signal.
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Citations
21 Claims
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1. A motor controller system comprising:
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solid state switches for connection between a single phase to three phase static converter and motor terminals for controlling application of three phase power to the motor;
sensors for sensing power from the static converter; and
a control connected to the sensors and the solid state switches for controlling operation of the solid state switches to run the motor, the control including a three phase detection scheme for preventing operation of the solid state switches in the absence of desired three phase power from the static converter, and a motor start scheme for disabling the three phase detection scheme for a select time after a motor run signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An elevator starter comprising:
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solid state switches for connection between a single phase to three phase static converter and motor terminals for controlling application of three phase power to the elevator;
sensors for sensing power from the static converter; and
a control connected to the sensors and the solid state switches for controlling operation of the solid state switches to run the elevator, the control including a three phase detection scheme for preventing operation of the solid state switches in the absence of desired three phase power from the static converter, and a motor start scheme for disabling the three phase detection scheme for a select time after an elevator run signal. - View Dependent Claims (8, 9, 10, 11)
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12. A motor controller system comprising:
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solid state switch means for connection between a single phase to three phase static converter and motor terminals for controlling application of three phase power to the motor;
sensing means for sensing power from the static converter; and
control means connected to the sensing means and the solid state switch means for controlling operation of the solid state switch means to run the motor, the control means comprising three phase detection means for preventing operation of the solid state switch means in the absence of desired three phase power from the static converter, and a motor start means for disabling the three phase detection means for a select time after a motor run signal. - View Dependent Claims (13, 14, 15, 16)
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17. A method of operating a soft starter in conjunction with a single phase to three phase static converter comprising:
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providing solid state switches for connection between a single phase to three phase static converter and motor terminals for controlling application of three phase power to the motor;
sensing power from the static converter; and
controlling operation of the solid state switches to run the motor;
operating a three phase detection scheme for preventing operation of the solid state switches in the absence of desired three phase power from the static converter; and
disabling the three phase detection scheme for a select time after a motor run signal. - View Dependent Claims (18)
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19. A method of operating a soft starter in conjunction with a single phase to three phase static converter comprising:
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providing solid state switches for connection between a single phase to three phase static converter and motor terminals for controlling three phase power to the motor;
sensing power from the static converter;
initiating a timer in response to a motor run signal;
controlling operation of the solid state switches to start the motor;
determining if desired three phase power is supplied from the static converter; and
allowing the motor to run for a select time period after initiating the timer and after the select time period faulting out if desired three phase power is not supplied from the static converter. - View Dependent Claims (20, 21)
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Specification