What are the three types of working systems of electric motors?

The working system of the motor indicates the allowable cycle time of the motor under different loads. The working system of the motor is: S1 S10;

Among them: (1) S1 working system: continuous working system, keeping the operation under constant load to a thermostable state; Abbreviated as S1;

2) S2 work system: short-time work system, this work system is referred to as S2, and then should be marked with continuous working hours. e.g. S2 60min;

3) S3 working system: intermittent cycle working system, running according to a series of the same working cycle, each cycle includes a period of constant load operation time and a period of shutdown and energy interruption time. This working system is referred to as S3, and then should be marked with the load continuation rate, such as S3 25%;

4) S4 working system: including the intermittent cycle working system of starting. This working system is abbreviated as S4, and then it should be marked with the load duration rate and the moment of inertia of the motor converted to the motor shaft.

jm, load moment of inertia jext, such as s4 25% jm=, jext= ;

5) S5 working system: including the intermittent cycle working system of electric braking. This working system is referred to as S5, and then should be marked with the load duration rate and the motor moment of inertia jm and load moment of inertia jext converted to the motor shaft, such as S5 25% jm =, jext = ;

6) S6 working system: continuous cycle working system. Each cycle includes a period of constant load operation and a period of no-load operation time, with no downtime and energy interruption time. This working system is referred to as S6, and then should be marked with load persistence rate, such as S6 40%;

7) Others:

S7 working system: continuous cycle working system including electric braking;

S8 working system: including continuous cycle working system with corresponding change of load-speed;

S9 working system: continuous cycle working system with non-periodic changes in load and speed;

S10 working system: discrete constant load working system.

The motor can be operated until it is thermally stable and is considered equivalent to one of the S3 S10 working systems.

The working system of the motor is: S1 S10; Wherein: The classification of the working system of the motor is the description of the load on the motor, which includes starting, electric braking, no load, energy stop and the duration and sequence of these stages, and the working system is divided into the following 10 categories:

S1 Continuous Duty: Running time at constant load is sufficient to achieve thermal stability. S2 Short-time work:

Run at a constant load for a given amount of time, which is not enough to achieve thermal stability, and then stop for a sufficient time to cool the motor again to within 2K of the temperature of the cooling medium. S3 Intermittent Cycle: Operates in a series of identical duty cycles, each consisting of a period of constant load operation and a period of intermittent energy stoppage.

The starting current for each cycle of this system does not have a significant effect on the temperature rise. The S4 includes a start-up intermittent cycle: it operates on a series of identical duty cycles, each of which includes a starting time that has a significant effect on the temperature rise, a constant load operation period, and a break-off stop time.

The S5 includes an intermittent cycle of electric braking: it operates in a series of identical duty cycles, each of which includes a starting time, a constant load run time, a fast electric braking time and a break-off stop time. S6 Continuous Cycle Duty System:

It operates in a series of identical duty cycles, each consisting of a period of constant load operation and a period of no-load operation, but no interruption of the running time. The S7 includes a continuous cycle of electric braking: it operates in a series of identical duty cycles, each consisting of a starting time, a constant load run time and a fast electric braking time, but no interrupted stop time.

The S8 includes a continuous cycle of variable speed and variable load: it is operated in a series of identical duty cycles, each of which consists of a period of constant load operation at a predetermined speed, and one or more other constant load operating times at different speeds, but no intermittent stopping time. S9 Load and speed non-periodic change duty system:

A non-cyclical duty system in which the load and rotational speed vary within the allowable range. This type of work includes frequent overloads, the value of which can be much higher than full loads. S10 Discrete Constant Load Duty Regime:

Includes no less than 4 discrete load values (or equivalent loads) of duty systems, each of which should run for a period of time sufficient to allow the motor to be thermally stable, with a minimum load value of zero in one duty cycle.

The working system of the motor is divided into three types: continuous, short-time, and intermittent.

The motor working system S1 to S9 is as follows:

S1 working system, continuous working system, keep running under constant load to a thermostable state, referred to as working system, short-time working system, this working system is referred to as S2, and then should be marked with continuous working time. For example, the S260MinS3 working system, the intermittent cycle of the industrial town to let the spike system, the slippery talk runs according to a series of the same working cycle, each cycle includes a period of constant load operation time and a period of shutdown, energy interruption time, this working system is referred to as S3.

S4 working system, including the starting intermittent cycle working system, this working system is referred to as S4, and then should be marked with the load duration rate and the motor moment of inertia jm and load moment of inertia jext converted to the motor shaft, such as S425% JM is equal to, JEXT is equal to the working system, including the intermittent cycle working system of electric braking, and the working system is referred to as S5.

S6 working system, continuous cycle working system. Each cycle includes a period of constant load operation time and a period of no-load operation time, no downtime, power failure time, this working system is referred to as S6, and then should be marked with a load duration rate, such as S640%. The S7 working system includes the continuous cycle working system of electric braking, which is referred to as the working system, and includes the continuous cycle working system with the corresponding change from load to speed.

S9 working system: continuous cycle working system with non-periodic changes in load and speed;

Introduction of the motor working system Yubu:

The motor working system is a description of the load that the motor is subjected to, including starting, electric braking, load, no-load, energy stoppage, and the duration and sequence of these phases. <>

The working system of the motor is determined according to the working time, cycle, starting times and other stools of the motor, and the common working systems are S1, S2, S3, S6, etc.

1.S1: Continuous operation system. The motor works continuously to reach the rated output power, and the ambient temperature does not exceed 40.

2.S2 Short-time work:The motor works according to the specified working cycle, each cycle has the same working time and no-load shutdown time, and the average temperature rise in the cycle should not exceed the limit value.

3.S3: Intermittent cycle. The motor works alternately between the load and the no-load state, allowing the motor to overload for a short period of time during the cycle, and the average temperature rise should not exceed the limit value.

4.S6: Intermittent periodic system. The motor works according to the working cycle specified by the Shengsun Brigade, and the motor is allowed to overload for a short time and allows the cooling time (i.e., shutdown time) during the cycle, and the ratio of the total working time to the cycle is called the working coefficient.

These working systems mark the use conditions and performance requirements of the motor, and users need to choose the appropriate working system according to the actual situation and needs when purchasing and using the motor.