Overspeed protection for a motor of a gate crossing mechanism
AssigneeSiemens Mobility GmbH
InventorsQuinton Reed, Daniel Spencer
Life of this patent
Estimating the term…
Abstract
Examples described herein provide a method for overspeed protection of a motor of a gate crossing mechanism. The method includes monitoring, by an overspeed protection circuit, a voltage across a first Zener diode and a second Zener diode. An anode of the first Zener diode is connected to an anode of the second Zener diode. The method further includes, responsive to determining that a Zener voltage threshold is exceeded, allowing a current to flow into a gate pin of a triac. The triac controls the motor of the gate crossing mechanism.
Claims14
A method for overspeed protection of a motor of a gate crossing mechanism, the method comprising:
- associating a first overspeed protection circuit with a first phase of a motor and a second phase of the motor,
- associating a second overspeed protection circuit with the second phase of the motor and a third phase of the motor, and
- associating a third overspeed protection circuit with the third phase of the motor and the first phase of the motor,
- monitoring, by the first overspeed protection circuit, a voltage across a first Zener diode and a second Zener diode, an anode of the first Zener diode being connected to an anode of the second Zener diode;
- monitoring, by the second overspeed protection circuit, a voltage across a third Zener diode and a fourth Zener diode, an anode of the third Zener diode being connected to an anode of the fourth Zener diode;
- monitoring, by the third overspeed protection circuit, a voltage across a fifth Zener diode and a sixth Zener diode, an anode of the fifth Zener diode being connected to an anode of the sixth Zener diode;
- and
- responsive to determining that a Zener voltage threshold is exceeded, allowing a current to flow into a gate pin of a triac, wherein the triac controls the motor of the gate crossing mechanism.
A gate crossing mechanism comprising:
- a motor having a first phase, a second phase, and a third phase;
- and
- a controller comprising a first overspeed controller associated with the first phase of the motor and the second phase of the motor, a second overspeed controller associated with the second phase of the motor and the third phase of the motor, and a third overspeed controller associated with the third phase of the motor and the first phase of the motor,
- wherein each of the first, second, and third overspeed controllers comprise a pair of Zener diodes in an anode-to-anode configuration, and wherein each of the first, second, and third overspeed controllers is configured to:
- monitor a voltage across their respective pair of Zener diodes to determine whether a Zener voltage threshold is exceeded, and
- responsive to determining that the Zener voltage threshold is exceeded, allow a current to flow into a gate pin of a triac, wherein the triac controls the motor of the gate crossing mechanism.
Dependencies are inferred from the claim text.