The stepper motor drive system consists of a stepper motor and a stepper motor driver. The performance of the stepper motor drive system depends not only on the performance of the stepper motor itself, but also on the advantages and disadvantages of the stepper motor driver. At the same time, the research on stepper motor driver and the research of stepper motor are almost synchronous, so stepper motor driver has an important position in the automotive power system. This article refers to the address: http:// The main function of the stepper motor driver subdivision is to improve the accuracy of the stepper motor. There are some drivers in China that use “smoothing†instead of subdivision, and some are also called subdivisions, but this is not a true subdivision, and the nature is different. 1. "Smoothing" does not precisely control the phase current of the motor, but only slows the rate of change of the current, so "smoothing" does not produce microsteps, and subdivided microsteps can be used for precise positioning. 2. When the phase current of the motor is smoothed, it will cause the motor torque to drop, and the subdivision control will not cause the motor torque to drop. On the contrary, the torque will increase. Key advantages of drive segmentation The low frequency oscillation of the motor is completely eliminated. Low-frequency oscillation is an inherent characteristic of stepper motors (especially reactive motors), and subdivision is the only way to eliminate it. If the stepper motor sometimes works in the resonance zone (such as arcing), the subdivision drive is the only one. s Choice. The output torque of the motor is increased. Especially for a three-phase reactive motor, the torque is increased by about 30-40% compared to when it is not subdivided. Improve the resolution of the motor. Since the step angle is reduced and the uniformity of the step is improved, it is self-evident that "increasing the resolution of the motor". LIN Stepper Motor Driver Solutions The higher the subdivision of the stepper motor driver, the higher the accuracy of the stepper motor? This is a wrong concept. For example, the stepping motor driver can be divided into 60,000 pulses and one revolution, and the stepping motor can not distinguish this precision. When the driver is set to 60,000 pulses/rev, the stepper motor driver accepts several pulses. Stepper motor takes one step, which does not improve the accuracy of the stepper motor. The subdivision technology of the stepping motor is essentially an electronic damping technology. Its main purpose is to reduce or eliminate the low frequency vibration of the stepping motor. Improving the running accuracy of the motor is only an incidental function of the subdivision technology. The actual step angle at which the motor is running after subdivision is a fraction of the base step angle. 24 hours mechanical Timer
setting at any time
Instructions:
Specifications:
Caution:
6.T his item is only for indoor use.
Mechanical Timer, mechanical timer socket, 24hr mechanical timer, mechanical timer plug, mechanical timer adaptor NINGBO COWELL ELECTRONICS & TECHNOLOGY CO., LTD , https://www.cowellsocket.com
Instant indicator
Min.setting time:15 minutes. Max.setting timer:24 hours
With hand switch,can be switched to operating and
1. Set program: 1 pin is equivalent to 15 minutes. Determine desired start time and push down pins until desired
off time.
For instance, if you want electrical devices to work from 8:00am to 11:00am and from 13:00pm to 17:00pm, you
just need to put down allthe pins between the three period time.
2. Set the current time: Turning the dial clockwise until the arrow pointing to
current time.
For example,if now it is 8:00 am, please turn the dial and make sure the
arrow point to 8. (See the picture.)
3. Plug the electrical device directly into the timer. Make sure the electrical
device is power-on.
4. Plug the timer into electrical outlet and the electrical device will be work
according to the setting program.
Note: = Normal Ope n = Timing
Make sure the switch on the Timing position. If it
is on the [Normal Open" mode, the electrical device is
always power-on and the timer function no work.
Rated Voltage, Current and Power
As shown on the label
Time Setting Range
15minutes24hours
Working Temperature
-10℃?+55℃
Operation
Clockwise
Insulation Resistance
>100M
Inherent Loss
≤1W
Application:
1. To enable high-power electric appliances to run automatically at off-peak time if there is different electricity
price according to different periods of time in some areas.
2. To use for electric appliances which need time control, such as water heaters, air conditioners, drinking
fountains, rice cookers, advertising lights and so on.
3. To control the charging time. For example, battery of electric bikes or mobile phones, storage batteries, etc.
4. Occasions which need switch on/off frequently, like interval spray irrigation for flowersand lawn, cyclical
adding oxygen to fish jar, fountains and so on.
5. Home safety precautions and lighting.
1.D o not exceed the maximum ratings of the timer.
2.M ust reset the current time after power failure.
3.D o not plug the timer directly into the working electrical appliances.
4.U nless changing the setting, keep the program same every day.
5.D o not disassemble timer by yourself. Professionals service are needed for maintenance.