Protecting device of electromobile

• US 6,131,057 A
• Filed: 06/13/1997
• Issued: 10/10/2000
• Est. Priority Date: 09/17/1993
• Status: Expired due to Term

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Kondo, Yasuhiro, Tamaki, Satoshi, Ikkai, Yasufumi
• Primary Examiner(s): Zanelli, Michael J.
• Application Number:
  US08/874,485
• Time in Patent Office: 1,215 Days
• Field of Search: 701/22, 701/34, 180/65.1, 318/638, 318/652, 318/653, 324/76.52, 324/76.77
• US Class Current: 701/22
• CPC Class Codes: B60L 2220/14 Synchronous machines
• CPC Class Codes: B60L 2240/12 Speed
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2240/425 Temperature
• CPC Class Codes: B60L 2240/427 Voltage
• CPC Class Codes: B60L 2240/429 Current
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 2250/26 by pedal actuation
• CPC Class Codes: B60L 3/0023 Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 3/0061 relating to electrical machines
• CPC Class Codes: B60L 3/04 Cutting off the power supply under fault conditions protective devices and circuit arrangements in general H01H; H02H
• CPC Class Codes: B60L 3/06 Limiting the traction current under mechanical overload conditions
• CPC Class Codes: B60L 50/51 characterised by AC-motors
• CPC Class Codes: B60L 58/15 Preventing overcharging
• CPC Class Codes: B60L 7/14 for vehicles propelled by ac motors
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

A protecting device of electromobile has control device to control the rotating speed of a motor on the basis of an accelerator signal, a brake signal, and output signals from an encoder sensor, a CS sensor, and a phase current detector, which includes a device for detecting interruption of input of the output signals and outputting detecting signal, a device for stopping supply of electricity to the motor in response to the detecting signal of the detecting device, a device for detecting a value of a phase current of the motor and outputting a detecting signal when the phase current is abnormal, and a device for stopping supply of electricity to the motor in response to the detecting signal of the phase current detecting device

Claims

1. A protecting device for use with an electromobile having a control device to control a rotating speed of a motor on the basis of an accelerator signal and a brake signal, said protecting device comprising:

a current detecting means for detecting a value of a phase current of the motor and outputting a detecting signal; and

a stopping means for stopping supply of all electricity to the motor when the phase current of the motor is abnormal on the basis of the detecting signal of said current detecting means.

2. A protecting device for use with an electromobile having a control device to control a rotating speed of a motor on the basis of an accelerator signal and a brake signal, said protecting device comprising:

a current detector operable to detect a value of a phase current of the motor and to output a detecting signal indicative of the value of the phase current; and

a stopping circuit operable to stop supply of all electricity to the motor when the phase current of the motor is abnormal based on the detecting signal of said current detector.