We offer high-performance and efficient range of that is widely used for its compact designing and unmatched processing speed. Manufactured from high quality components, our DC Drives offer outstanding performance and durability.
CONTROLLING DC MOTOR
A thyristor bridge is a technique commonly used to control the speed of a DC motor by varying the DC voltage. Examples of how a DC rectifier bridge operates are given on the next few pages. Voltage values given in these examples are used for explanation only. The actual values for a given load, speed, and motor vary.
A DC drives supplies voltage to the motor to operate at a desired speed. The motor draws current from this power source in proportion to the torque (load) applied to the motor shaft.
100% SPEED 0% LOAD
In this example an unloaded motor connected to a DC drive is being operated at 100% speed. The amount of armature current (Ia) and unloaded motor needs to operate is negligible. For the purpose of explanation a value of 0 amps is used.
100% SPEED 100% LOAD
A fully loaded motor requires 100% of rated armature current at 100% speed. Current flowing through the armature circuit will cause a voltage drop across the armature resistance (Ra). Full voltage (500 VDC) must be applied to a fully loaded motor to operate at 100% speed. To accomplish this, thyristors are gated earlier in the sine wave (36.37°).
ANON AUTOMATION make DC Drives are highly sophisticated and provided with adjustments as default factory set.
- Semi-conductor fuses in the incoming lines for protection of thyristors.
- di/dt protection
- dv/dt protection
- Surge suppressor across each thyristor
- Electronic single phase protection
- Electronic instantaneous over current trip
- Over temperature protection for thyristor
- Current sensing type field loss relay
Input supply : 415volts +/-10%, 3 phase, 50 HZ.
Field voltage : 220V DC
Thyristor bridge configuration : Full wave, fully controlled using six Thyristors.
Output voltage : 440V DC infinite variable.
Speed regulation : +/- 1 % using tacho generator feedback +/- 3 % using Armature feedback.
Direction of rotation : Bi-directional.
Static over-current trip (SOT) : 150% peak of rated current.
Min. Voltage : Adjustable from up to 35% adjustable.
Max. Voltage : 110% of rated voltage.
Acceleration/Deceleration time : From 2.0-30 sec.
Current limit : 100% of full load rated current.