Fan motor controller
AssigneeGlobal Mixed-mode Technology Inc.
InventorChia-Tai Yang
Life of this patent
Estimating the term…
Abstract
A fan motor controller comprises a pulse width modulation signal, a switch circuit, a control unit, and a frequency judging unit. The switch circuit is coupled to a fan motor for supplying a driving current to the fan motor. The control unit generates a control signal to the switch circuit, so as to control the switch circuit. The frequency judging unit receives the pulse width modulation signal for generating a judging signal to the control unit. The pulse width modulation signal is configured to adjust a speed of a fan. The pulse width modulation signal has a frequency. Based on the frequency and a judgment rule, the fan motor controller is configured to attain the function of switching between the forward direction and the reverse direction of the fan.
Claims11
A fan motor controller comprising:
- a pulse width modulation signal, configured to adjust a speed of a fan, wherein the pulse width modulation signal has a frequency, and the fan has an original rotation direction;
- a switch circuit, configured to supply a driving current to a fan motor;
- and
- a control unit, configured to generate a control signal to the switch circuit for controlling the switch circuit, wherein the fan motor controller attains a function of switching between a forward direction and a reverse direction of the fan based on the frequency.
Dependencies are inferred from the claim text.