Variable speed motor drive
First Claim
1. In a motor drive of the type having a sensing input for sensing fault conditions and a speed control input for receiving a speed control signal and varying the speed of a variable speed motor based on the speed control signal, the variable speed motor being adapted for connection to a power supply coupled to a supply input with the motor drive controlling motor speed in the variable speed motor based on the speed control signal such that the motor speed corresponds to the level of the speed control signal, the improvement comprising:
- a power interrupter, coupled between the supply input and the variable speed motor, for controllably interrupting power to the motor; and
a drive controller, coupled to the motor drive, for monitoring the sensing input, for controlling the power interrupter to interrupt power when a fault condition occurs, and for providing the speed control signal to the speed control input at a level to stop the motor when a fault condition occurs.
3 Assignments
0 Petitions
Accused Products
Abstract
A motor drive having a sensing input for sensing fault conditions and a speed control input for receiving a speed control signal. The variable speed motor drive is suitable for being powered by a power supply coupled to a supply input and controls motor speed in a variable speed motor based on the speed control signal such that the motor speed corresponds to the level of the speed control signal. The disclosed motor drive includes a power interrupter, coupled between the supply input and the variable speed motor, for controllably interrupting power to the motor as well a a drive controller coupled to the motor drive for monitoring the sensing input and causing the power interrupter to interrupt power when a fault condition occurs. The drive also provides that speed control signal to the speed control input at a level which stops the motor when a fault condition occurs.
41 Citations
19 Claims
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1. In a motor drive of the type having a sensing input for sensing fault conditions and a speed control input for receiving a speed control signal and varying the speed of a variable speed motor based on the speed control signal, the variable speed motor being adapted for connection to a power supply coupled to a supply input with the motor drive controlling motor speed in the variable speed motor based on the speed control signal such that the motor speed corresponds to the level of the speed control signal, the improvement comprising:
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a power interrupter, coupled between the supply input and the variable speed motor, for controllably interrupting power to the motor; and a drive controller, coupled to the motor drive, for monitoring the sensing input, for controlling the power interrupter to interrupt power when a fault condition occurs, and for providing the speed control signal to the speed control input at a level to stop the motor when a fault condition occurs.
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2. The motor drive of claim wherein the improvement further comprises:
a data entry apparatus capable of providing the drive controller with desired control data from an operator. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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10. In an apparatus suitable for use in processing dough and being driven by a variable speed motor of the type having a motor drive with a sensing input for sensing fault conditions in the apparatus and having a speed control input for receiving a speed control signal, the motor drive driving the motor at a speed as a function of the speed control signal, the improvement comprising:
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a power interrupter, coupled to the variable speed motor, for controllably interrupting power to the motor; and a drive controller, coupled to the motor drive, for monitoring the sensing input, for controlling the power interrupter to interrupt the power when a fault condition occurs, and for providing the speed control signal to the motor drive at the speed control input in a state to stop the motor when a fault condition occurs. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification