Overload prevention device for permanent magnet DC motors

A technology of electric motors and equipment, which is applied to the reduction gear of AC motors, starters of single DC motors, motor generators/starters, etc., and can solve problems such as power consumption and overall system efficiency reduction
CN101501952AInactive Publication Date: 2009-08-05丹纳赫传动有限责任公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
丹纳赫传动有限责任公司
Publication Date
2009-08-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method, apparatus or computer program implements an overload prevention approach involving monitoring a speed (410) o a motor, detecting an overload condition of the motor based on the monitored speed, and controlling an operation of the motor according to the detected overload condition.
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Description

[0001] This International Disclosure is based on and claims priority to U.S. Patent Application Serial No. 11 / 461,170, filed July 31, 2006, entitled "Overloade Prevention Device for Permanent MagnetDC Motors," the entire contents of which are hereby incorporated by reference . technical field

[0002] The present invention relates to a method, system and apparatus for preventing overload conditions on electric motors, in particular permanent magnet DC motors as used in linear actuators or rotary actuators. Background technique

[0003] Traditionally, where electric motors are employed, the current is monitored in some way to prevent overloading. This can be accomplished with a thermally activated switch commonly known as a thermal protector. The device requires the overload condition to last for a certain period of time to heat the thermal element, from seconds to minutes depending on the severity of the overload. Then, the device needs a period of time to cool down after ...

Claims

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