In a dual voltage motor, the coils are connected in what configuration for higher voltage?

For a dual voltage motor to operate at a higher voltage, the coils must be connected in series. When the coils are connected in series, the voltage across each coil adds up. This configuration allows the motor to receive the full voltage supplied by the power source, which is necessary for operation at the designated higher voltage level.

Using series connection effectively increases the total impedance of the motor, allowing it to operate efficiently at higher voltages. This is particularly useful in applications where higher voltage is needed to achieve greater power output or different operational characteristics.

Other configurations, such as parallel, would reduce the overall voltage seen by each coil since they would each receive the same supply voltage. Series/parallel configurations are also used for specific applications, but they do not provide the exclusive series connection required for simply achieving higher voltage operation. An open circuit would not provide any voltage to the motor, making it inoperable.