Deere & Company

Stephen P Lind

Kent D Wanner

Michael Ray Schlichtmann

Richard E Wainwright

Dustin E Oelmann

Orrin B West

A polarity detector is configured to detect whether a polarity of one of the secondary direct current terminals is reversed in polarity consistent with an improper connection of a removable load or the removable direct current energy source to the secondary direct current terminals. A protection module or transient clamp comprises a protection semiconductor switch with protection switched terminals and a protection control terminal. A controller is configured to control a plurality of switches of the circuit breaker and the protection module via a driver. Further, the controller is configured to open or activate the circuit breaker responsive to a signal or data message of the polarity detector detecting the improper connection.

Polarity protection for a converter

An inverter comprises output switches for generating motor phase currents for application to an electrical motor based on a commanded torque. A current sensor is arranged for detecting motor phase currents applied to the electrical motor by an inverter. A voltage sensor is configured for measuring voltages applied to the electrical motor by the inverter. An output port is capable of outputting output signals of the detected motor phase currents and measured voltages for processing by a vehicle controller. The output signals are suitable for input to a vehicle controller for determining whether or not to generate an override control signal. An input port is configured for receiving the override control signal from the vehicle controller. The input port is coupled to an override input module for switching off a supply of electrical energy to the electric motor.

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Fargo, ND, United States of America

Stephen P Lind