H bridge? motor control
Budget: $250 – $750 USD
I want to control a DC motor in both directions controlled by a forward and reverse relay. T
he motor and supply is separate and done by me.
I need to monitor a select-able and adjustable AC Current in the range of 5A to 50A. I do have 100A shunts.
Lets say I select and set 20A.
If the current is lower then 20A, the forward relay will energize the motor until the current goes up to 20A.
If the current goes over 20A , the reverse relay will energize the motor until the current drops back to 20A.
The motor is driving a variac (variable transformer). The motor is slow and will not really overshoot. The current change is also very slow. The hysteresis should be not larger then 1.5A
If the control is de-energized, the reverse relay contacts will be closed and the motor will run from the separate power until a limit switch stops it.
If the control is energized there will be 0 AC current and the forward relay contact will close and drive the motor until it reaches 20A. Of course the reverse relay contacts will open.
The supply voltage is 120V 60Hz. I do have 100A shunts.
he motor and supply is separate and done by me.
I need to monitor a select-able and adjustable AC Current in the range of 5A to 50A. I do have 100A shunts.
Lets say I select and set 20A.
If the current is lower then 20A, the forward relay will energize the motor until the current goes up to 20A.
If the current goes over 20A , the reverse relay will energize the motor until the current drops back to 20A.
The motor is driving a variac (variable transformer). The motor is slow and will not really overshoot. The current change is also very slow. The hysteresis should be not larger then 1.5A
If the control is de-energized, the reverse relay contacts will be closed and the motor will run from the separate power until a limit switch stops it.
If the control is energized there will be 0 AC current and the forward relay contact will close and drive the motor until it reaches 20A. Of course the reverse relay contacts will open.
The supply voltage is 120V 60Hz. I do have 100A shunts.