Motor with circuits for protecting motor from input power outages or surges
First Claim
1. A motor apparatus comprising:
- a DC motor comprising a stator and a rotor;
an AC to DC converter configured to receive an AC power input and to convert the AC power input to a DC power;
a PWM signal generator configured to generate PWM signals;
a switching circuit configured to generate a PWM switched power using the DC power and the PWM signals, and to supply the PWM switched power to the DC motor; and
at least one control circuit configured to detect irregularities in the AC power input and to send a control signal to the PWM signal generator, wherein upon receiving the control signal the PWM signal generator is configured to stop generating the PWM signals and then restart generating a new set of PWM signals.
5 Assignments
0 Petitions
Accused Products
Abstract
A DC motor is provided. The DC motor prevents rush or overload of current in the DC motor during and/or after power input irregularities to the DC motor. A control circuit of the DC motor is configured to control current provided to the DC motor. When power irregularities in the power input to the DC motor are detected by the control circuit, the control circuit stops generating PWM (Pulse Width Modulated) signals and stops the current provided to the DC motor. After the stoppage of PWM signals, the control circuit can perform a soft-start of the PWM signals when the power irregularities are no longer detected. The soft starting of the PWM signals generates gradual increase in current to the DC motor, thus, preventing sudden rush of current that cause malfunction of the DC motor.
-
Citations
20 Claims
-
1. A motor apparatus comprising:
-
a DC motor comprising a stator and a rotor; an AC to DC converter configured to receive an AC power input and to convert the AC power input to a DC power; a PWM signal generator configured to generate PWM signals; a switching circuit configured to generate a PWM switched power using the DC power and the PWM signals, and to supply the PWM switched power to the DC motor; and at least one control circuit configured to detect irregularities in the AC power input and to send a control signal to the PWM signal generator, wherein upon receiving the control signal the PWM signal generator is configured to stop generating the PWM signals and then restart generating a new set of PWM signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A method of operating a motor apparatus, the method comprising:
-
providing a motor apparatus comprising; a DC motor comprising a stator and a rotor, an AC to DC converter, an at least one control circuit, a PWM signal generator, and a switching circuit; generating PWM signals at the PWM signal generator; converting an AC power input to a DC power at the AC to DC converter; generating a PWM switched power using the DC power and the PWM signals at the switching circuit; supplying the PWM switched power to the DC motor; detecting irregularities in the AC power input at the at least one control circuit; stopping to generate the PWM signals upon detecting at least one irregularity in the AC power input; and subsequent to stopping, restarting to generate a new set of PWM signals. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
-
Specification