초록 ▼

The present invention provides a new limiting signal circuit configuration for the connection of a pulse-width modulation motor controller integrated circuit. This new circuit allows for increased control over the over-current protection scheme while increasing the maximum available current levels.

The present invention provides a new limiting signal circuit configuration for the connection of a pulse-width modulation motor controller integrated circuit. This new circuit allows for increased control over the over-current protection scheme while increasing the maximum available current levels. The invention utilizes a resistor based voltage divider connected to an input power source to provide a sliding scale current limiting signal in proportion to the input voltage. This method provides protection in relationship to the incoming power signal.

대표청구항 ▼

1. An improved over-current protection circuit for a pulse width modulation motor controller, comprising:a variable input voltage signal; a ground signal; a pulse width modulation motor control signal; a motor current signal; a current adjustment signal which sets a limit for said motor current sign

1. An improved over-current protection circuit for a pulse width modulation motor controller, comprising:a variable input voltage signal; a ground signal; a pulse width modulation motor control signal; a motor current signal; a current adjustment signal which sets a limit for said motor current signal; an integrated circuit chip which selectively outputs said pulse width modulation motor control signal in proportion to said variable input voltage signal, said ground signal, said current adjustment signal and said motor current signal; a first resistor, wherein said first resistor connects said variable input voltage signal and said current adjustment signal; and a second resistor, wherein said second resistor connects said current adjustment signal and said ground signal, whereby said first resistor and said second resistor control said current adjustment signal in proportion to said variable input voltage signal.