TECHNICAL SUPPORT
发布时间： 2026-04-08
When a servo or a motor runs with less power than in the same , the root cause is often the two . This lists the why and with each other, based on and . these is the first step to a and .
A realworld : a a small arm. When only the move, works fine. But when the DC start,the lose or . The is that draw a high ( )伟创动力, which can be 2 to 3 times their . If the power this , the drops. , which have builtin , are very to drops. A drop below their them to reset or .
Why this : The power has a . The motor's high a "" on the power rail.
: an board one servo and one small gear motor. The motor is PWM for speed. The servo , when the motor speed. The issue is not the power 's but the . The motor's flows the same wire as the servo's . As the motor's load , its , a small, on the path. The servo's this as a .
Why this : A wire has . Motor this a (V = I * R). This noise the servo's .
a DIY : a robot using two DC and a servo for a pantilt . When the run, the servo or moves to wrong even when no is sent. at the . These . This can be up by the servo's wire, which acts like an . The servo's this noise as valid .
Why this : EMI from the motor's onto the line the and the servo.
In a with a DC motor, a servo to the same power might work fine until the motor is off. At the of off, the motor's field , a high spike known as Back Force (Back EMF). This spike back along the power wires. Servo are not to these high ,which can cause or伟创动力舵机, over time, to the servo's board.
Why this : A motor acts as a when its power is cut. The field a surge that can be many times than the .
A uses long wires to place a servo far from the main board, near a motor. The servo . Long wires have and . They act as for EMI. The motor's noise, which might be over a short 10cm wire, a major over a 50cm wire. The wire pair for the servo ( and ) also forms a large loop area, which is very at up field noise from the motor.
Why this : wire and loop area make the servo's much more to both and noise from the motor.
To , and for three :
1. Power: cause drops or on the power line.
2. : Motor noise on the path, the servo's .
3. : noise that onto the servo's wires.
Based on the above, these steps to build a :
1. Use Power : Power the from one or and the (and their ) from . only the (GND) of the two at a point.
2. Add a Servo Power Wire: If using one , run thick, power and wires from the to the . Do not route motor the servo's wire. the servo and at one point (star ).
3. a Large : Place a large (e.g., 1000µF to 4700µF, rated than your ) the power and near the motor or the main power input. This and some .
4. Add on Motor: For , a small (e.g., 0.1µF) the motor's . You can also add from each to the motor's metal case. This and EMI at the .
5. Use for : For long servo , use a 3 wire. the to the at the end only (not at the servo end). This the from and as an .
6. Keep Wires Short and : Keep all servo and motor wires as short as . Twist the servo's power and wires . Twist the motor's power wires . the loop area that picks up or noise.
By your power , , and this list, you can and fix any motorservo issue. Start with the power and , as these are the most .
