While induction motors are great for some applications, sometimes you need a high-speed motor that can provide more precise control. This is where brushless DC motors come in handy. These motors can be used for a wide range of applications from robotics to electric vehicles. However, finding the right controller for these motors can be a challenge.
One way to get started is by looking at washing machine motors. Many modern washing machines use brushless DC motors, and these motors can be repurposed for other applications. However, just like with induction motors, finding the right controller can be a challenge. But one hacker, [Jerry], has found a way to hack the controller that comes with a Maytag MAH7500 Neptune front loader washing machine.
The first step is to troubleshoot the machine using a factory service mode, which can help identify any issues with the motor or controller. Once the machine has been fully tested, it's time to source the schematics to identify the pinouts of the various connectors. With this information, it's possible to experiment with a scope and a function generator to get the motor spinning with the original controller doing the hard work.
The benefit of this hack is that it allows you to use the original motor controller, which is properly rated for the motor on hand. This eliminates the need to find a separate variable frequency drive, which can be expensive and difficult to source. It's also a great inspiration for anyone else looking to drive similar motors in their own projects.
When it comes to driving high-speed brushless DC motors, the key is finding the right controller. But with a little bit of hacking and experimentation, it's possible to repurpose washing machine controllers for other applications. Just make sure to follow the proper safety procedures and consult the schematics to ensure that everything is properly connected. With a little bit of ingenuity, you can turn an old washing machine motor into a powerful tool for your next project.