How the H-Bridge driver controls the DC motor movement?
An H-Bridge is made up of four switches: two in series, and two in parallel, with the load placed in between the switches. In this configuration the circuit takes an “H” shape. In order to change the direction of the voltage supplied, the H-Bridge controls the switches that deliver power to the load ( S1 ).
Can an H-Bridge control speed?
An “H-Bridge” is an arrangement of transistors that allow you to control both the direction and speed of the motor.
How do you make an H-Bridge circuit?
First we need to hook up a resistor to each transistor’s base. Next we’ll connect each set of resistors to a common point in preparation to connect a switch. Then we’ll add the two switches which also connect to the positive bus. These switches will activate one half of the H-Bridge at a time.
How can a PWM control an H-Bridge?
PWM is often used in conjunction with an H-Bridge. This configuration is so named because it resembles the letter H, and allows the effective voltage across the load to be doubled since the power supply can be switched across both sides of the load.
Why do we use H-Bridge?
An H-bridge is an electronic circuit that switches the polarity of a voltage applied to a load. These circuits are often used in robotics and other applications to allow DC motors to run forwards or backwards.
What is the purpose of an H-Bridge?
Why starters are required in a DC motor?
Starters are used to protect DC motors from damage that can be caused by very high current and torque during startup. They do this by providing external resistance to the motor, which is connected in series to the motor’s armature winding and restricts the current to an acceptable level.
Why are DC motors more expensive than AC?
Cost. DC motors generally cost significantly more than AC motors due to their higher manufacturing costs. Also, because AC induction motors have such widespread use, economies of scale contribute to their relatively lower price.