Energy recovery in electromechanical motors
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United States of America Patent
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-
May 13, 2003
Grant Date -
Aug 22, 2002
app pub date -
Feb 20, 2001
filing date -
Feb 20, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a method according to the present invention, charging and discharging of motor phases (10A, 10B) in an electromechanical motor is performed with a small voltage difference between the voltage source and the capacitive load of the motor phase (10A, 10B). This is accomplished by connecting a series of voltage sources (36), one at a time. Energy from the discharging operation is stored to be used in subsequent charging operations. In a device according to the present invention, the voltage sources (36) are preferably provided by means of capacitive or induction voltage step-up or step-down circuits. Preferably, switches (34) control the charging and discharging. In a preferred embodiment, the capacitance of one motor phase (10A) is used for storing charge resulting from the discharge from another motor phase (10B).
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