Electricity: motive power systems – Induction motor systems – Braking
Patent
1998-04-06
2000-01-04
Sircus, Brian
Electricity: motive power systems
Induction motor systems
Braking
318375, 318376, H02P 318
Patent
active
060113782
ABSTRACT:
A control apparatus by which a duty ratio in consideration of how energy stored in storage cells is consumed is set to ensure a steady traveling feeling, a regeneration brake which can produce stable braking forces regardless of how storage cells are consumed, and a protective device by which a plurality of operation stop levels are set to be able to cancel the stop operation effected for the first time and to ensure reliable alarming, are provided. In the first and second embodiments, a chopper duty ratio is compensated depending on how storage cells are consumed, to provide a steady agreeable traveling feeling. In the third embodiment, regenerated electric power is consumed by a motor driving circuit to stabilize operation of a regeneration brake regardless of how storage cells are consumed, and improve performance thereof. In the fourth embodiment, in a protective device for determining an operating condition of equipment, issuing an alarm in the event of abnormality, and stopping operation of the equipment, the stop operation is effected in two steps and a cancel switch for canceling the stop operation in the first step is provided to, depending on the situation, cancel the stop operation effected by the protective device.
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Kozaki Minoru
Tabata Kunio
Janofsky Eric B.
Seiko Epson Corporation
Sircus Brian
Tokyo R&D Co.
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