GENERAL ELECTRIC DRIVE SYSTEM

Systems employed for stir control are called DRIVES and may employ any of the high carriers analogous as, diesel or petrol machines, gas or reek turbines, reek machines, hydraulic motors and electric motors are known as ELECTRICAL DRIVES.
Block illustration of an electrical drives is weight is generally a ministry designed to negotiate a given task,e.g. suckers, pumps, robots, washing machines, machine tools trains and drills.
POWER MODULATOR PERFORMS FOLLOWING FUNCTIONS
Modulates flux of power from the source to the motor in such a manner that, motor is imparted speed- choker characteristics demanded by the weight.
During flash operation analogous as starting, braking and speed reversal, it restricts source and motor currents within permissible values.
Converts electrical energy of the source in the form suitable to the motor.
Selects the mode of operation of the motor i.e. motoring or braking PART OF ELECTRICAL DRIVES 1. Electrical motor and weight 2. Power modulator 3. Sources 4. control unit 5. seeing unit ELECTEICAL MOTORS most generally used electrical drivesared.c motors- shunts series, conflation and endless magnet. INDUCTION MOTORS Squirrel pen, crack rotor and direct SYNHRONOUS MOTORS wound field and endless magnet.Brushlessd.c. motors, stepper motors and switched disinclination motors can be used. POWER MODULATORS Some drives may employ further than one of these modulators. It can be classified into 1. Convert 2. Inverter 3. AC voltage controller 4. DC choppers 5. Cyclo transformers ELECTRICAL SOURCE In india single phase and three phase 50 Hz ac supplies are readily

1.  avaible in utmost locales. veritably low power drives are generally fed from single phase source. Rest of the drives are powered from 3 phase source. Low and medium power motors are fed from 400v force. For advanced conditions, motor may be rated at3.3 KV,6.6 kv,11 kv. Some drives are powered from a battery, battery voltage may have 24v, 48v and 110v dc. seeing UNIT 1. Speed seeing 2. Current seeing speed seeing is needed for perpetration of unrestricted circle speed control schemes. Speed is generally tasted by using tachometers. When veritably high speed rigor are needed as in computer supplemental and paper manufactoriesetc., digital tachometers are used. Two generally used styles of seeing the current are 1. use of current detector employing hall effect 2. Involves the use fa a non- inductive resistance shunt in confluence with an insulation amplifier which has as arrangement for an modification and insulation between power and control circuits.