US 9,438,144 B2Granted

System and method for fault protection of a motor

AssigneeGeneral Electric Company

InventorsFei Xu, Xu Chu, Pengju Kang, Heng Wu, Baoming Huang

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Abstract

An exemplary motor driving system includes a power source, a driving circuit, a controller, a motor, and a protection circuit. The driving circuit including at least one switching device coupled with the power source. The motor includes a plurality of windings. The motor is coupled with the driving circuit and driven by the driving circuit. The controller is configured to provide first switch signals to the at least one switching device of the driving circuit in a normal mode. The protection circuit is coupled with the controller, and configured to generate second switch signals based at least in part on a fault signal in a fault mode and provide the second switch signals to the at least one switching device of the driving circuit so as to reconstruct circuit loops between the driving circuit and the plurality of windings. A method for operating the motor driving system is also described.

Claims10

Dependent claims

A motor driving system, comprising:

a power source;
a contactor coupled with the power source:
a DC/DC converter coupled with the power source, comprising:
an H bridge, a first inductor, and a second inductor, wherein the H bridge comprises a first leg with a first upper switch and first lower switch, and a second leg with a second upper switch and second lower switch:
a DC/AC inverter coupled with the DC/DC converter:
a motor coupled with DC/AC inverter, the motor comprising a plurality of windings and driven by DC/AC inverter:
a controller configured to provide first switch signals to the DC/AC inverter in a normal mode;
and a protection circuit coupled with the controller, configured to generate second switch signals based on a fault signal in a fault mode, wherein the second switch signals generated by the protection circuit comprise:
a turn-off signal provided to switches of the DC/AC inverter:
an open signal provided to the contractor to cut off the power source from the motor;
and
a turn-on signal provided to both of the first upper switch and the second lower switch, or both of the second upper switch and the first lower switch of the H bridge to connect the first inductor and the second inductor with the windings of the motor.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/205,489Filed 12 Mar 2014
Priority: CN 2013 1 008217314 Mar 2013
Published: US 2014/0265979 A118 Sep 2014
Granted: 6 Sep 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

H02P 29/024
Providing protection against overload without automatic interruption of supply: detecting a fault condition, e.g. short circuit, locked rotor,…
B60L 50/52
Using propulsion power supplied by batteries or fuel cells: characterised by DC-motors
B60L 58/10
Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles: for monitoring or…
H02P 6/12
Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position;…:…

Family

US 2014/0265979 A1Pre-grant publication · published 18 Sep 2014
US 9,438,144 B2This patent

From the US filing history. Foreign family members aren’t listed.

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