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996 Electrical Technology 29.1. Motor Principle An Electric motor is a machine which converts electric energy into mechanical energy. Its action is based on the principle that when a current-carrying conductor is placed in a magnetic field, it experiences a mechanical force whose direction is given by Fleming’s Left-hand Rule and whose
The document discusses direct current (DC) motors. It describes how back electromotive force (EMF) regulates the current in a DC motor to meet load requirements. It also explains the different types of DC motors - shunt wound, series wound, and compound wound - and how their field windings are connected.
3 maj 2019 · Dep. of Electrical Power Technology Eng., Technical college / Mosul, Northern Technical University. 1- Most of the electrical machines in service are AC types. 2- DC machine are of...
performance of the DC motor, such as fast torque response and speed accuracy, while using rugged, inexpensive and mainte-nance free AC motors. Summary In this section we look at the evolution of DTC, charting the four milestones of variable speed drives, namely: – DC motor drives 9 – AC drives, frequency control, PWM 11
When a d.c. motor is used in driving system, its basic operational characteristics are determined by both the values of the resisting torque TL created by the load, and the electromechanical properties of the motor itself. In the steady-state operation of the drive, it has been shown in Chapter Ten, Section, that the value of the torque Tm.
Whenever a machine converts electrical energy which is DC in nature, into mechanical energy, it is called a DC Motor. EE. Faraday’s Laws of Electro magnetic Induction. Whenever a conductor cuts the flux of a magnetic field, an emf is produced in the conductor.
The DC motor has a rotating set of electro-magnetic poles called the rotor. A DC voltage is applied to the rotor through a set of terminals called brushes. The brushes are attached to a rotating device called a commutator which feeds the rotor winding(s) that create the rotor’s electro-magnetic field(s).
