Slip ring motors are a type of motor that is used in a wide variety of applications. They are known for their high efficiency and reliability, but they must be started correctly in order to get the most out of them. There are several different ways to start a slip ring motor, and each has its own advantages and disadvantages.
Direct On Line Starting
Direct on line starting is the most common way to start a slip ring motor. In this method, the motor is connected directly to the power supply and is started by simply switching on the power. This method is simple and cost-effective, but it can cause a large inrush of current which can damage the motor if not managed properly.
Soft Starting
Soft starting is a method of starting a slip ring motor that reduces the inrush of current. This is done by using a device such as a variable frequency drive or a soft starter to gradually increase the voltage applied to the motor. This method is more expensive than direct on line starting, but it can help to protect the motor from damage caused by a large inrush of current.
Star Delta Starting
Star delta starting is another method of starting a slip ring motor. In this method, the motor is connected to the power supply in a star configuration and then switched to a delta configuration once the motor is up to speed. This method is more complex than direct on line starting, but it can help to reduce the inrush of current and can be used to start large motors.
Variable Frequency Drive Starting
Variable frequency drive starting is a method of starting a slip ring motor that uses a variable frequency drive to control the speed of the motor. This method is more expensive than direct on line starting, but it can help to reduce the inrush of current and can be used to start large motors. It also allows for precise control of the motor speed, which can be useful in certain applications.