How do I control speed and keep it constant?
A sophisticated control system would be required to keep the speed regulated to a tight tolerance. Utilizing an encoder feedback, the customer’s control can monitor and adjust the 0-5VDC input can |
My pump is losing speed; does the drive have a problem?
Pumps are divided into three basic categories: centrifugal,
rotary, and reciprocating. Take any of the three types and break it down
further into four parts, the rotating element, the casing, the m |
Can I run my application at extremely low speeds?
Three major problems exist with both conventional methods of
motor control and VFD control. (1) When a motor is directly coupled and run at low speed it
becomes very inefficient. One could go with |
What is the difference between Unipolar and Bipolar motors?
A traditional unipolar wound motor has six lead wires. Each winding has a center tap. Unipolar wound motors are typically used in applications requiring high speed and high torque. A traditional bipo |
What is the difference between a closed loop stepper motor controller and an open loop stepper motor controller?
In an open loop stepper motor controller, there is no feedback going from the motor to the controller, so the controller cannot make any necessary adjustments. This type of controller is effective wh |
How can I calculate my power needs?
A simple formula can be used to roughly determine what is needed power-wise. Here’s an example:
Motor Speed:
3600 RPM
Motor Torque:
340 mNm = 48 inoz = 3
|
What determines the life expectancy of a Brushed DC motor?
Typically, the brushes are the limiting component in a Brush DC motor's life expectancy. The life expectancy of the brush is dependent on application parameters such as torque, speed, duty cycle and |
What is a brushless motor?
A Brushless DC (BLDC) motor is a rotating electric machine where the stator is a classic three-phase stator like that of an induction motor and the rotor has surface-mounted permanent magnets. In thi |
What are the advantages of using a brushless motor versus a brush style motor?
No brush noise, efficient, durable, robust, easy to cool Linear current/torque Synchronous speed control Position and Speed Servo (open/closed loop) Customizable Performance Extended Life |
Are two power sources needed for integral control motors?
Motors can be programmed to function with only one power source. This scheme would be a setup where on/off is the only requirement. Typically, motors that will speed regulate, will require two power |
Are there any noise benefits of a Brushless motor?
Yes, with the elimination of brushes, BLDC motors can be regulated to slower operating speeds without sacrificing torque. Brushless motors can also utilize skewed magnets to reduce the effect of cogg |
What does "inverter" mean as opposed to a drive/amplifier which are also used to describe the electronic unit that controls a motor.
The terms inverter, drive, and amplifier are used somewhat
interchangeably in industry. But there are subtle differences. A drive can
refer to the motor, the control electronics, or both. This term |