AC fan motor driving circuit having capability of monitoring the rotation rate and status of the AC fan motor
First Claim
1. An AC fan motor driving circuit having capability of monitoring rotation rate and status of the AC fan motor driving circuit comprising:
- a driving circuit module used to drive an AC fan and at least comprising a driving IC that hastwo controlling outputs alternately outputting a trigger signal; and
a rotation status detecting output, wherein the rotation status detecting output is unconnected when the AC fan motor is in a lock condition and connects to ground when the AC fan motor operates normally;
a rotation rate detecting module comprisinga transistor connected to one of the two controlling outputs of the driving IC; and
a photo coupler havingan input connected to the transistor; and
at least one output outputting a rotation rate signal for computing the rotation rate of the AC fan motor; and
a rotation status detecting module comprisinga photo coupler havingan input connected to the rotation status detecting output of the driving IC; and
at least one output outputting a rotation status signal to determine whether the AC fan motor operates normally.
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Accused Products
Abstract
A driving circuit has a driving circuit module, a rotation rate detecting module and a rotation status detecting module. The driving circuit module is used to drive an AC fan motor and has at least a driving IC having two controlling outputs and a rotation status detecting output. The rotation rate detecting module has a transistor and an photo coupler. The transistor is connected to one of the two controlling outputs of the driving IC. The photo coupler is connected to the transistor and outputs a rotation rate signal to compute the rotation rate of the AC fan motor. The rotation status detecting module has an photo coupler connected to the rotation status detecting output of the driving IC and outputting a rotation status signal to determine whether the AC fan motor operates normally.
8 Citations
8 Claims
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1. An AC fan motor driving circuit having capability of monitoring rotation rate and status of the AC fan motor driving circuit comprising:
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a driving circuit module used to drive an AC fan and at least comprising a driving IC that has two controlling outputs alternately outputting a trigger signal; and a rotation status detecting output, wherein the rotation status detecting output is unconnected when the AC fan motor is in a lock condition and connects to ground when the AC fan motor operates normally; a rotation rate detecting module comprising a transistor connected to one of the two controlling outputs of the driving IC; and a photo coupler having an input connected to the transistor; and at least one output outputting a rotation rate signal for computing the rotation rate of the AC fan motor; and a rotation status detecting module comprising a photo coupler having an input connected to the rotation status detecting output of the driving IC; and at least one output outputting a rotation status signal to determine whether the AC fan motor operates normally. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification