Thyristor control switch for a bidirectional motor
First Claim
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1. A bidirectional on/off switching component of a motor powered according to a first or a second polarity, the switching component being connected in series with the motor and having a control terminal, comprising:
- two head-to-tail connected cathode gate thyristors; and
two diodes of same polarity, having first same polarity terminals respectively connected to a gate of a respective one of the two thyristors, and having second terminals connected together, the connected second terminals being coupled to the control terminal of the switching component.
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Abstract
An on/off switching component of a motor powered according to a first or a second polarity, connected in series with the motor. The switching component includes two head-to-tail connected cathode gate thyristors, and two diodes of same polarity. The two diodes have first same polarity terminals respectively connected to the gate of a respective one of the two cathode gate thyristors and second terminals connected together to a control terminal.
27 Citations
18 Claims
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1. A bidirectional on/off switching component of a motor powered according to a first or a second polarity, the switching component being connected in series with the motor and having a control terminal, comprising:
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two head-to-tail connected cathode gate thyristors; and two diodes of same polarity, having first same polarity terminals respectively connected to a gate of a respective one of the two thyristors, and having second terminals connected together, the connected second terminals being coupled to the control terminal of the switching component. - View Dependent Claims (2, 3, 4, 5)
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6. A bidirectional on/off control system of a set of motors, each motor of the set of motors having a first terminal and a second terminal, the first terminal of each respective motor being connected in series to a first terminal of a respective switching component, the second terminal of each respective motor and a second terminal of each respective switching component being respectively connectable to a first terminal and a second terminal of a power supply, each respective switching component having a control terminal being connected to a logic output of a controller, wherein each respective switching component comprises:
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two head-to-tail connected cathode gate thyristors; and two diodes of same polarity, having first same polarity terminals respectively connected to a gate of a respective one of the two thyristors, and having second terminals connected together, the connected second terminals being coupled to the control terminal of the respective switching component.
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7. A bidirectional switch for controlling a motor, comprising:
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a first switch terminal; a second switch terminal for coupling the bidirectional switch to the motor; a control terminal; a first cathode gate thyristor having a cathode, an anode, and a gate, the cathode of the first thyristor being coupled to the first switch terminal, the anode of the first thyristor being coupled to the second switch terminal, and the gate of the first thyristor being coupled to the control terminal; a second cathode gate thyristor having a cathode, an anode, and a gate, the cathode of the second thyristor being coupled to the anode of the first thyristor, the anode of the second thyristor being coupled to the cathode of the first thyristor, and the gate of the second thyristor being coupled to the control terminal; a first diode coupling the gate of the first thyristor to the control terminal, the first diode having an anode that is connected to the control terminal and a cathode that is connected to the gate of the first thyristor; and a second diode coupling the gate of the second thyristor to the control terminal, the second diode having an anode that is connected to the control terminal and a cathode that is connected to the gate of the second thyristor. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A bidirectional switch for controlling a motor, comprising:
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a first terminal connected to the motor to receive one of a supply voltage and a reference voltage; a second terminal connected to the other of the supply voltage and the reference voltage; a control terminal to receive a logic signal level pulse having a single direction; first solid state means, connected to the first terminal, the second terminal, and the control terminal, for continuously conducting current from the first terminal to the second terminal in direct response to the logic signal level pulse when the first terminal receives the supply voltage and the second terminal receives the reference voltage; second solid state means, connected to the first terminal, the second terminal, and the control terminal, for continuously conducting current from the second terminal to the first terminal in direct response to the logic signal level pulse when the first terminal receives the reference voltage and the second terminal receives the supply voltage; third means, connecting the first solid state means to the control terminal, for preventing spurious triggering of the first solid state means; and fourth means, connecting the second solid state means to the control terminal, for preventing spurious triggering of the second solid state means. - View Dependent Claims (15, 16, 17, 18)
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Specification