Two ways to connect sliding rheostat

Two connection methods of sliding rheostat: Series connection method: control current, adjust voltage; Advantages: control current, adjustable output voltage; Disadvantages: high power consumption, low resolution. Voltage-dividing connection method: adjust the voltage to obtain high resolution; advantages: low power consumption, high resolution; disadvantages: unable to control the current, and the output voltage is affected by the load. The choice of connection method depends on the specific application requirements.

Two connection methods of sliding rheostat

The sliding rheostat is a variable resistor, its resistance Can be changed by moving the sliding contact. It has two common connection methods: series connection and partial voltage connection.

Series connection method

In the series connection method, the sliding rheostat is connected in series with the load. The sliding contacts divide the resistor into two variable parts, one connected between the positive terminal of the power supply and the load, and the other between the load and the negative terminal of the power supply.

• Advantages:

  • Can control the current through the load
  • Can adjust the output voltage

• Disadvantages:

  • High power consumption
  • Lower resolution

Divisional voltage connection method

In the voltage division connection method, the sliding rheostat is connected in parallel between the load and the power supply. The sliding contacts divide the resistor into two parts, one in parallel with the load and one in parallel with the power supply.

• Advantages:

  • Low power consumption
  • High resolution

• Disadvantages:

  • Unable to control the current through the load
  • The output voltage is affected by the load

Select the connection method

Selecting the connection method of the sliding varistor depends on the needs of the specific application:

• If you need to control the load current, use Series connection method.
• If you need to adjust the output voltage or obtain high resolution, use the voltage divider connection method.

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