Essay: Speed Control Method of DC Motor & AC Motor

In the industrial centers of the use of general-purpose engines for a number of our environment to adjust the contract goods to machine tools. Position and performance needed for large engines. Focus on the speed of the motorcycle/ market with speed, servo and stepper motor control parts, plus induction motor engine and brushless DC motor with external resistor and / or tick voltage controller. the contract goods to machine tools. Position and performance needed for large engines. Focus on the/ speed of the motorcycle market with speed, servo and stepper motor control /parts, plus induction motor /engine and brushless DC motor with external resistor and / or tick voltage controller.
Various SPEED CONTROL MOTOR
The circuit output control method Construction of /single-phase and three-phase induction motors where the stator winding is wound and a basket of basic shapes, including solid aluminum die-cast router

ORGANIZATION OF SPEED CONTROL MOTOR

AC SPEED CONTROL MOTOR
Structure of Motor

The motor speed is controlled, is used to detect the. speed Tacho generator. and as a motor is attached. Tacho generator. motor shaft and detects. the magnetic poles, and brings a revolution magnet attached directly to. a stator coil that .is an AC voltage per .12 cycles.

Opinion of Speed Control
Rotational/ speed N. of an induction motor can be shown: by the expression . Then the rotational speed /N will change When the voltage applied to the motor. is increased and decreased, the slip s changes,.

Control voltage mode is controlled by the control phases by adapter speed control. Using AC was off and (Thyristor or Thyristor and AC) Drive to rotate, AC / configuration (can change from 50 to 60Hz can bse adjusted directly to a switching element in each half cycle of the AC/ voltage of the voltage) or voltage application and Speed Control r.m.s. Controlled/ phase control method is derived from the value of the AC/ voltage.

Control/ voltage mode is controlled by the control phases by/ adapter speed control. Using AC was off and /(Thermistor or Thermistor and AC) Drive to rotate, AC / configuration (can change from /50 to 60Hz can be adjusted directly to a switching element in each half cycle of the AC voltage of the voltage) or voltage application and Speed Control/ r.m.s. Controlled/ phase control method is derived from the value of the AC/ voltage.

The AC speed control method can also provide car stable speed control loop phase control by closing the stable range.

D and E compare the speed set value voltage detected by a speed Tacho generator amplifier block is checked. The voltage signal is used to determine a level.
Set low speed to increase the voltage signal, and/ when the detection value of the lower speed limit when it is finished., When the voltage applied to slow the engine speed and engine speed spin. Rotation reduced the difference/ between the feed speed and detection speed set value /is repeated so that control can be consistent.

Using the closed-loop /control phase AC motor speed control has the following characteristics.

Since/ the AC voltage is direct control, can be configured .speed control circuit for a smoothing circuit that allows a compact. design. at a low price, is essential. just because.
Similarly/, it is possible to design a long life because this method is widely used in ac motor.
Switching/ is done. every half cycle of operation .of the commercial .AC power supply, which is created.. only one time less noise.
BRUSHLESS DC SPEED CONTROL UNIT
Construction of Motor..
As for the construction of a brushless motor, star-wired with three stages of a coil (Y- wired): U, V, and W in the stator, and the rotor is made of a multi-pole/ magnetized magnets the configuration.

Principle of Speed Control
This method is most effective method which had been used worldwide in controlling the induction motor. When the ratio of voltage and frequency/ remains constant due to which torque in the motor will also remain constant and it will give us maximum run time efficiency.this method is used in most of the AC motor to control nowadays also.

In this technique two motor is used and both are located in related shaft hence called cascade motor. So that is why the speed of both of them is also same. One motor is energized by 3 phase and other one is induces EMF from slip rings.
Then control circuit (driver) production is realized by a ”nfrtr section. This is shown in the inverter and the DC current is switched off in sequence creates a three-phase AC voltage. Six switching elements (faith or ”gbt) Six switching elements

They are motor winding as shown in switching elements and the switching element direction of the coil determines.

In the case of, for example, Step 1, transistors TR1 and Tr6 is turned on, and current flows from the U phase to W phase. Then, U phase is excited /becomes an S pole, and the router keep times .
Shows /the configuration of a brushless DC motor speed control unit in a block diagram.

Brushless DC motor units have the following characteristics’
1) Constant V/F is the most mutual technique which is used for regulatory the speed of motor. If the ratio among/ V / F is remaining constant then flux also remains constant/ in the result torque produce also constant so it is successfully /adjust the speed of the motor.

A typical switching sequence (120 degrees energy method).. A low noise motor drive mechanism is driven by results that this method does not change the existing post.

A brushless of rotational speed torque characteristics have a limited duty region in the The voltage inverter unit, a three-phase induction motor speed control by changing the, f switching elements, to express the, f into the formula and changes in motor speed ratio .
In this technique two motor is used and both are located in related shaft hence called cascade motor. So that is why the speed of both of them is also same. One motor is energized by 3 phase and other one is induces EMF from slip rings.?
INVERTER CONTROLLER UNIT
frequency, f. of torque V / F, the voltage V to the frequency F it can be said, will continue to make steady.by changing the on /six switching elements, to express the frequency, f into motor.?
From this relationship, the ratio of torque V / F, the voltage V to the frequency F it can be said, will continue to make steady.?

In addition, to apply voltage winding has a sine wave shape triangle wave called a carrier signal with an average voltage sine This method is called PWM control.?
The voltage.e applied to the motor. inverter unit, a three-phase induction motor speed control by changing the. frequency, f unit by an. average voltage sine This method is called PWM control.changing the on / off cycles. of six switching elements, to. express inverter unit, A low noise motor drive. mechanism is driven by results that this method does not change .the existing post..a three-.phase. induction motor speed control by changing the frequency, f. The. inverter unit by changing elements, to express the frequency From this relationship F it can be said, will continue to make steady’
Open loop control method

The voltage applied to the motor inverter unit, a three- control by changing the frequency, f. The inverter the on / off cycles of six switching elements, to express the frequency, f into the formula and speed ratio (N)
From this relationship, the ratio of torque V / F, the F it can be said, will continue to make steady.
. In this technique two motor is used and both are located in related shaft hence called cascade motor. So that is why the speed of both of them is also same. One motor is energized by 3 phase and other one is induces EMF from slip rings.

Closed Loop Control’.

It is designed according to the inverter mass output voltage and driving the frequency characteristics of the data table (Figure 25) of the main stream between the phase detects without being required on the motor using a speed sensor load, and reveals the difference between frequency control inverter.

SUMMARY

The main stream between the phase detects without being required on the motor using a speed sensor load, and reveals the difference between frequency control inverter Proper speed control product function, performance, cost, and can be selected according to the desired goal for your application.?

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