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I. INTORODUCTION

The purpose of motor controls are to control the The torque, speed , 1 and position of a motor are controlled using a motor controller. Because the tTorque generated by of the motor is proportional to the amount of current flowing through it, ; therefore, directly torque control was is  2 very rarely used. In almost everymost applications, cascade control structure is used as show in (Fig. 1).

). This means that the The drive electronic drives that supplies that controls the electrical energy supplied to the motor receives gets the control signals from the current controller, that which  3 gets receives it’s set pointits setpoint from the speed controller etc. The current controller is called the drive -specific, since because its operation is greatly considerably effectedaffected by the type of the motor. The position and speed controllercontrollers are called task -specific because it isthey are more considerably 4 affected by the motor-driven  5 machine being driven by the motor.

II. FUNDAMENTALS OF MOTOR CONTROLLERSLS FUNDAMENTALS

In contrast to position controller or speed controller, It is not necessary to use all three of the controls in all applications. In some cases position or speed control is not needed but current controller is used in every all caseapplications. The reason of this is that the current control is not only because it ensuringensures stable and controlled torque generation and current supply but giving the possibility to limit the current of the machine, and with this function, it is able to be protectedto prevent motor from overload [3 ]. The three controllers run at different speeds. For example the current controller is way faster than the speed controller. ].

The fFeedback values of the controlers controllers have tomust be measured. Measuring the cCurrent can be completed measured with using a shunt resistor or a Hall Effect effect current transducer. , whereas For speed and position measurementcan be measured using quadrature encoders can be used [7 ][10 ]. For position control usually proportional (P) or rarely proportional-diffrential (PD) controllers are used. The three controllers operate at different speeds; for example, the current controller is considerably faster than the speed controller. The type of the speed controller is usually pProportional- 6 integral (PI) controller is commonly used as a speed controller. For position control, usually proportional (P) controllers, or rarely proportional–differential (PD) controllers, are used. We can get the current control with proportional-integral (PI) or hysteresis hysteresys controllers can be used for current control [8 ].

Explanations

I. INTORODUCTION

The purpose of a motor controls controller are is  1 to control the torque, speed, and position of a motor. Because the torque generated by of the motor is proportional to the amount of current flowing through it, directly torque control was is  2very rarely used. In almost everymost applications, cascade control structure is used, as shown in Fig. 1.

). In other words, This means that the drive electronic drives that supplies that controls the electrical energy supplied to the motor receives gets the control signals from the current controller,that which  3gets receives it’s set pointits setpoint from the speed controller etc. The current controller is called the drive -specific, since because its operation is greatly considerably effectedaffected by the type of the motor. The position and speed controllercontrollers are called task -specific because it isthey are more considerably affected by the machine being driven by the motor.

II. FUNDAMENTALS OF MOTOR CONTROLLERSLS FUNDAMENTALS

It is not necessary to use all three of the controls controllers in all applications. In some cases applications, position or speed controller is not needed required; however, but current controller is used in every all caseapplications. The reason of tThis is because that the current controller is not only ensuringensures stable and controlled torque but giving the possibility to limits the current of supplied to the machine, and with this function, thereby it is able to be protected protecting the motor from overload [3 ]. The three controllers run operate at different speeds. For example, the current controller is considerably way faster than the speed controller.

The fFeedback values of the controlers controllers have to be measured. Measuring the cCurrent can be completed measured with using a shunt resistor or a Hall Effect effect current transducer. For speed and position measurements,  4quadrature encoders can be used [7 ][10 ]. For position control, usually proportional (P) or rarely proportional - 5 differential (PD) controllers are used. The type of the speed controller is usually pProportional-integral (PI) controller is commonly used as a speed controller. We can get the current control with proportional-integral ( PI 6) or hysteresis hysteresys controllers can be used for current control [8 ].

Explanations

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