Introduction of Power Resistors

The inhibition conductor to current is called the conductor's resistance. In physics, resistors are used to indicate the size of the conductor impedes the current flow. The larger the conductor's resistance, the larger the conductor impedes current flow. Different conductors, different resistances, resistance is a character of conductor itself.

Power refers to the work done by the object in unit time, that is, the power is a physical quantity that describes how fast and slow work is done.

The formula is: P=W/T

Power measurement

Power measurement is used to measure the power consumed by electrical equipment, widely used in household appliances, lighting equipment, industrial machinery and other research and development or production lines and other fields.

Here are several power measuring methods:

1. Power measurement technology

2. Diode detection power method

3. Equivalent thermal power detection method

4. TRMS / DC conversion test power method

5. Logarithmic amplification detection power method

Introduction of normal household appliances' powers

Air conditioner: 1500W

Microwave oven: 1000W

Electric stove: >1000W

Water heater: >1000W

Vacuum cleaner: 800W

Hair dryer: 500W

Electric iron: 500W

Washing machine: <500W

TV: 200W

Computer: 200W

Range hood: 140W

fridge: 100W

Electric fan: 100W

Flashlight: 0.5W

Calculator: 0.5mW

Digital watch: 0.01mW

Resistors are the most widely used component in circuits, the main physical feature is change the electrical energy to thermal energy, so they can be called energy-consuming component, internal energy made when current passes through resistors. Resistors are usually for dividing voltage and current, for signals, AC and DC signals can be passed through resistors.

Classification of resistors:

As per resistance value: fixed resistors, adjustable resistors, sensitive resistors;

As per material: carbon film resistors, metal film resistors, wire wound resistors, JEPSUN resistors, thin film resistors;

As per installation: SMD resistors, DIP resistors;

As per function: load resistors, sampling resistors(current sensing resistors), shunt resistors, protective resistors.

Main parameters of resistors:

1. Rated resistance

2. Tolerance

3. Rated power

Although resistors are a small electric component, but it contains a lot of information and widely used in our electric products. Microhm electronics is a professional resistors supplier and manufacturer in this industry. They have real-time delivery and innovative products and golden service with good reputation in the world.