Current characteristics of steering gear with great resistance

Jane Medium ： This experiment shows ,  As a servo actuator ,  The working current has obvious impact characteristics ,  The starting current is larger than the normal working current 7 About times .  When designing the power supply of the steering gear, its characteristics should be considered .

key word ： The steering gear , Working current

 

§01 rudder Machine working current

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   hand There is a steering gear on the side ,  It's hard to rotate .  Next, we plan to test its working characteristics ,  See if you can continue to work .  And compare with other steering gears .

  
   Use ESP32 As PWM Control signal output experimental board .  according to ESP32 Adapter board design The interface definition given in the article ,  Use GPIO2 Output PWM Control of steering gear .  Output 100Hz, High level slave 1ms To 2ms Pulse of   Control the steering gear to rotate left and right .  This is the action when the steering gear rotates left and right .  On the whole , It seems that there is nothing special about the steering gear .

  
   So here comes the question ： Why is this helmsman turning , The resistance is particularly high ？  This requires testing the working current of the steering gear . Use here HALL Current sensor to measure .  This is to measure the working current when the steering gear rotates ;  The starting current reaches 1.75A,  The stable operation current also has 0.25A.  Let's compare another U400 The steering gear .  This is its working current .  You can see whether it is the starting current ,  Or working current , Are less than the working current of the front steering gear .

  
   ad locum , By comparing the working current of the steering gear ,  It indicates that the output resistance of the steering gear increases , It also increases the working current of the steering gear .

  
 

※ total    junction ※

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   this Experiments show ,  As a servo actuator ,  The working current has obvious impact characteristics ,  The starting current is larger than the normal working current 7 About times .  When designing the power supply of the steering gear, its characteristics should be considered .

  

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■ Links to related literature :

• ESP32 Adapter board design