Motor drive
AssigneeOMRON Corporation
InventorsYoichi Sakuma, Atsushi Kawano
Life of this patent
Estimating the term…
Abstract
An apparatus for driving a motor that opens and closes the window of vehicle, for example, is so adapted that when the vehicle becomes submersed in the sea, a lake or a river, etc., the window is prevented from being closed owing to malfunctioning of a relay caused when a leakage current flows into an operating switch for opening and closing the window. When submersion is sensed and it is sensed that the motor is being rotated by a malfunction in a direction that closes the window, a relay for rotating the motor in the forward direction is actuated. This prevents the occurrence of a situation in which the motor is caused to rotate (especially in the direction that closes the window) regardless of the fact that the operating switch has not been operated.
Claims10
A motor drive apparatus for driving a motor in a forward direction or in a reverse direction by actuating a relay that rotates the motor in the forward direction or a relay that rotates the motor in the reverse direction by supplying power to the motor in response to a forward-rotation command or reverse-rotation command provided by an operating portion, comprising:
- submersion sensing means for sensing that at least the operating portion of the motor drive apparatus has become submersed;
- first malfunction sensing means for sensing that one relay of said relays, which is for rotating the motor in a predetermined one direction, has been actuated;
- and
- first forcible control means for actuating the other relay in response to submersion being sensed by said submersion sensing means and actuation of the one relay being sensed by said first malfunction sensing means.
A motor drive apparatus having two relays for rotating a motor in a forward or reverse direction by supplying power to the motor, wherein the relays are actuated to rotate the motor in the forward or reverse direction in accordance with the operating state of an operating portion that is for commanding forward or reverse rotation of the motor, comprising:
- submersion malfunction sensing means for outputting a submersion malfunction detection signal upon sensing that the motor drive apparatus has been submersed and that one relay of the said relays, which is for rotating the motor in one direction, has been actuated;
- and
- forcible control means for energizing a relay coil that is for actuating the other of the said relays, irrespective of the operating state of said operating portion, in response to output of said submersion malfunction detection signal.
A motor drive apparatus having two relays for rotating a motor in a forward or reverse direction by supplying power to the motor, wherein the relays are actuated to rotate the motor in the forward or reverse direction in accordance with the operating state of an operating portion that is for commanding forward or reverse rotation of the motor, comprising:
- submersion sensing means for outputting a submersion detection signal upon sensing that the motor drive apparatus has become submersed;
- and
- forcible control means for actuating both of said relays, irrespective of the operating state of said operating portion, in response to output of said submersion detection signal.
Dependencies are inferred from the claim text.