Motor actuator with torque control

Details Motor actuator with torque control Motor actuator with torque control

2006-02-28

2006-02-28

Duda, Rina (Department: 2837)

Electricity: motive power systems

Constant motor current, load and/or torque control

C318S434000, C318S461000, C318S280000, C318S466000

Reexamination Certificate

active

07005818

ABSTRACT:
In a motor actuator, e.g., a valve actuator, comprising a reversible electrical motor, a drive circuit is providing a stop function, when the torque of the motor exceeds a predetermined maximum torque. The drive circuit is constructed as a two-terminal circuit connected in series with the reversible electrical motor, and the electrical power is supplied to the series connection with a mainly fixed voltage VCC and a polarity which provides the desired rotational direction of the motor. This provides the possibility of having the drive circuit positioned close to the motor and maintaining full torque control and stop function with two wire connections.

REFERENCES:
patent: 4455012 (1984-06-01), Gupta
patent: 5040331 (1991-08-01), Merendino et al.
patent: 5265590 (1993-11-01), Takagi
patent: 5929580 (1999-07-01), Mullet et al.
patent: 6118243 (2000-09-01), Reed et al.
patent: 0 090 152 (1983-02-01), None
patent: 0 590 227 (1993-02-01), None
patent: 11-266591 (1999-09-01), None

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