The servo motor manufacturer reminds you of several points that you must know when choosing a servo motor

In addition to a few conventional methods, there are also internal issues that need to be noted when choosing a servo motor. Have you also paid attention to them in your daily life? You may not know these points. Servo motor manufacturer Yuecheng Electromechanical tells you.

So, what are the issues to pay attention to when choosing a servo motor?

(1) Typical working hours

The working system of servo motors is a main basis for selecting servo motors, and machinery with different working systems should choose corresponding rated motors. The working system of a motor refers to the load bearing situation of the motor, including the starting, electric braking, no-load, energy interruption and stop rotation of the motor, as well as the duration and sequence of these stages. Divided into the following categories:

S1 continuous working system: The operating time under constant load is sufficient to achieve thermal stability.

S2 short-term working system: Run at a constant load for a given time, which is not enough to achieve thermal stability. Then, cut off the power and stop for a sufficient time to allow the motor to cool again to within 2K of the temperature difference with the cooling medium. For example, S2-60 minutes typically last for 10 minutes, 30 minutes, 60 minutes, and 90 minutes.

S3 intermittent cycle working system: operates according to a series of identical working cycles, each cycle including a constant load operating time and a period of energy outage and shutdown time. Usually, the load duration is 15%, 25%, 40%, and 60%, with each cycle lasting for 10 minutes.

S4 includes intermittent cycle working system for starting: operate according to a series of identical working cycles, each cycle including starting time that has a significant impact on temperature rise, a period of constant load operation time, and a period of energy outage stop time.

S5 includes intermittent cycle working system of electric braking: operating according to a series of identical working cycles, each cycle includes a starting time, a constant load operating time, a fast electric braking time, and a power outage stop time.

S6 continuous cycle working system: operates according to a series of identical working cycles, each cycle including a constant load operating time and a no-load operating time, but without interruption or shutdown time.

S7 includes a continuous cycle working system for electric braking: operating according to a series of working cycles, each cycle including a starting time, a constant load operating time, and a fast electric braking time, but without energy interruption stopping time.

S8 includes a continuous cycle working system with variable speed and variable load: operating according to a series of identical working cycles, each cycle includes a constant load operating time at a predetermined speed, as well as one or several operating times of other constant loads at different speeds, but without interruption or stopping time.

S9 duty cycle with non periodic changes in load and speed: duty cycle with non periodic changes in load and speed within the allowable range.

(2) Maximum speed of the motor

The selection of motors should first be based on the speed of the machinery, and the motor speed calculated through the mechanical speed should be strictly controlled within the rated speed of the motor.

(3) Necessary torque and load torque

The necessary torque refers to the sum of the load torque required to overcome mechanical friction resistance and the necessary acceleration torque during mechanical acceleration and deceleration. Load torque refers to the torque required by a motor to overcome the frictional resistance of the contact part of the transmission mechanism. Under normal working conditions, the load torque TL shall not exceed 80% of the rated torque TM of the motor.

TL=TmaxD ½≤ TM × 80%

(Tmax is the maximum torque (N.m); D is the maximum load ratio)

(4) Continuous overload time

The continuous overload time should be limited to the specified overload time of the motor.

Yuecheng Electromechanical, a servo motor manufacturer, is a high-tech enterprise that integrates research, development, production, and sales of servo products. We are willing to produce high-quality products that are "low-carbon, energy-saving, and environmentally friendly" for our customers, providing personalized customization and comprehensive after-sales service. The servo motor manufacturer Yuecheng Electromechanical looks forward to working with you!

~The servo motor manufacturer reminds you of several points that you must know when choosing a servo motor

In addition to a few conventional methods, there are also internal issues that need to be noted when choosing a servo motor. Have you also paid attention to them in your daily life? You may not know these points. Servo motor manufacturer Yuecheng Electromechanical tells you.

So, what are the issues to pay attention to when choosing a servo motor?

Typical working hours

The working system of servo motors is a main basis for selecting servo motors, and machinery with different working systems should choose corresponding rated motors. The working system of a motor refers to the load bearing situation of the motor, including the starting, electric braking, no-load, energy interruption and stop rotation of the motor, as well as the duration and sequence of these stages. Divided into the following categories:

S1 continuous working system: The operating time under constant load is sufficient to achieve thermal stability.

S2 short-term working system: Run at a constant load for a given time, which is not enough to achieve thermal stability. Then, cut off the power and stop for a sufficient time to allow the motor to cool again to within 2K of the temperature difference with the cooling medium. For example, S2-60 minutes typically last for 10 minutes, 30 minutes, 60 minutes, and 90 minutes.

S3 intermittent cycle working system: operates according to a series of identical working cycles, each cycle including a constant load operating time and a period of energy outage and shutdown time. Usually, the load duration is 15%, 25%, 40%, and 60%, with each cycle lasting for 10 minutes.

S4 includes intermittent cycle working system for starting: operate according to a series of identical working cycles, each cycle including starting time that has a significant impact on temperature rise, a period of constant load operation time, and a period of energy outage stop time.

S5 includes intermittent cycle working system of electric braking: operating according to a series of identical working cycles, each cycle includes a starting time, a constant load operating time, a fast electric braking time, and a power outage stop time.

S6 continuous cycle working system: operates according to a series of identical working cycles, each cycle including a constant load operating time and a no-load operating time, but without interruption or shutdown time.

S7 includes a continuous cycle working system for electric braking: operating according to a series of working cycles, each cycle including a starting time, a constant load operating time, and a fast electric braking time, but without energy interruption stopping time.

S8 includes a continuous cycle working system with variable speed and variable load: operating according to a series of identical working cycles, each cycle includes a constant load operating time at a predetermined speed, as well as one or several operating times of other constant loads at different speeds, but without interruption or stopping time.

S9 duty cycle with non periodic changes in load and speed: duty cycle with non periodic changes in load and speed within the allowable range.

Maximum speed of the motor

The selection of motors should first be based on the speed of the machinery, and the motor speed calculated through the mechanical speed should be strictly controlled within the rated speed of the motor.

Necessary torque and load torque

The necessary torque refers to the sum of the load torque required to overcome mechanical friction resistance and the necessary acceleration torque during mechanical acceleration and deceleration. Load torque refers to the torque required by a motor to overcome the frictional resistance of the contact part of the transmission mechanism. Under normal working conditions, the load torque TL shall not exceed 80% of the rated torque TM of the motor.

TL=TmaxD ½≤ TM × 80%

(Tmax is the maximum torque (N.m); D is the maximum load ratio)

Continuous overload time

The continuous overload time should be limited to the specified overload time of the motor.