How does the starter motor work?
When you turn the ignition on, the starter motor engages and turns the engine over allowing it to suck in air. The pinion meets the flywheel and the starter motor turns. This spins the engine over, sucking in air (as well as fuel). As the engine turns over, the starter motor disengages, and the electromagnet stops.
What are the two types of starter motor?
The two main types of starters are Manual Starters and AC Magnetic Motor Starters, commonly known as Motor Starters.
How does a pre engaged starter motor work?
The pre-engaged starter motor is fitted with a relay valve which controls the movement of the pinion. When the starter motor is activated the pinion moves along the shaft until it comes into contact with the toothed ring-gear. The pinion interlocks with the ring-gear before rotating to crank the engine.
What is the main purpose of the starter motor?
A motor starter provides defense by first controlling the electrical output of your device or equipment at its initial point of operation (when you turn it on or it engages).
What are the basic components of a motor starter?
A 3-pole full-voltage magnetic motor starter is made up of the following components: a set of stationary contacts, a set of movable contacts, pressure springs, a solenoid coil, a stationary electromagnet, a set of magnetic shading coils, and the moving armature.
What happens when the starter motor starts under load?
When the starter motor starts under load: it draws high current and produces high torque. Technician A says that the starter solenoid switches the high current on and off. Technician B says that the solenoid on the starter motor engages the starter drive with the ring gear.
What is a 3 phase motor starter?
Three-phase (three-pole) electromagnetic across-the-line motor-starters. This type of three-pole motor-starter is usually described as a three-phase across-the-line or full-voltage motor-starter because full line voltage is applied to the respective motor leads when the motor-starter solenoid coil is energized.
How does the starter engage the flywheel?
When you turn the ignition switch, the starter motor is energized, and the electromagnet inside the body engages. This pushes out a rod to which the pinion gear is attached. The gear meets the flywheel, and the starter turns. This spins the engine over, sucking in air (as well as fuel).
What is the difference between pre-engaged and inertia starter motors?
The key difference between inertia and pre-engaged starting is that the pinion on a pre-engaged starter motor fully engages with the ring-gear before rotating at high-speed. With inertia starters, the sudden impulse of the pinion as it begins to rotate causes the gear to move forward along a helix shaft.
What is the function of the motor starter with respect to current?
Explanation: The main function of the starter is to prevent excessive current flow. At the same time it should allow current to produce good or high starting torque.
What are the two basic elements of a motor starter?
Contactor Construction and Operation. A magnetic motor starter has two basic parts: the magnetic contactor and an overload relay .