ilme electrical components Germany ilme model ilme price

ilme electrical components are current-limiting elements. When a resistor is connected in a circuit, its resistance is generally fixed with two pins, limiting the current through the branch it is connected to. Resistors with unchangeable resistance are called fixed resistors. Those with variable resistance are called potentiometers or variable resistors. An ideal resistor is linear, meaning the instantaneous current through it is proportional to the applied instantaneous voltage. Variable resistors used for voltage division have one or two movable metal contacts pressed tightly against the exposed resistive body. The position of the contact determines the resistance between either end of the resistive body and the contact. A two-terminal device where terminal voltage and current have a definite functional relationship, reflecting the ability to convert electrical energy into other forms, is represented by the letter R, with the unit Ohm Ω. Actual devices such as light bulbs, heating wires, and resistors can all be represented as resistor elements. The resistance value is generally related to temperature, material, length, and cross-sectional area. The physical quantity measuring the effect of temperature on resistance is the temperature coefficient, defined as the percentage change in resistance when the temperature increases by 1 ℃. The main physical characteristic of a resistor is converting electrical energy into thermal energy; it is also known as a dissipative element, generating internal energy as current passes through it. Resistors typically serve to divide voltage and current in circuits. For signals, both AC and DC signals can pass through resistors.

ilme electrical component principles

Generators convert mechanical energy into electrical energy, and dry cells convert chemical energy into electrical energy. Generators and batteries themselves are not charged; their two poles have positive and negative charges respectively, generating voltage (current is formed by the directional movement of charges under the action of voltage). Charges are inherently present in conductors; to generate current, only voltage needs to be applied. When the two poles of a battery are connected to a conductor, positive and negative charges are released to generate current. When the charges are exhausted, the current (and voltage) disappears. Dry cells and similar devices are called power sources. A device that converts AC to DC via transformers and rectifiers is called a rectified power supply. Electronic devices capable of providing signals are called signal sources. Bipolar junction transistors can amplify incoming signals and transmit the amplified signals to subsequent circuits. For the subsequent circuit, a bipolar junction transistor can also be regarded as a signal source. Rectified power supplies and signal sources are sometimes also referred to as power sources.

ilme electrical component applications

Inductors mainly serve functions such as filtering, oscillation, delay, and notch filtering in circuits, as well as signal selection, noise filtering, current stabilization, and suppression of electromagnetic interference. The most common function of an inductor in a circuit is to form an LC filter circuit together with a capacitor. Capacitors have the characteristic of blocking DC and passing AC, while inductors have the function of passing DC and blocking AC. If DC power accompanied by many interference signals passes through an LC filter circuit, the AC interference signals will be converted into thermal energy by the inductor and consumed. When the relatively pure DC current passes through the inductor, the AC interference signals within it are also converted into magnetic induction and thermal energy. Higher frequencies are more easily impeded by the inductor, thereby suppressing high-frequency interference signals. Inductors have the characteristic of blocking AC while allowing DC to pass smoothly; the higher the frequency, the greater the coil impedance. Therefore, the main functions of inductors are to isolate and filter AC signals, or to form resonant circuits with capacitors, resistors, etc.

ilme electrical component parameters

1. Voltage temperature coefficient: Refers to the rate of change of the nominal voltage of a varistor within a specified temperature range, i.e., the relative change in voltage across the varistor when the temperature changes while the current through the varistor remains constant. 2. Current temperature coefficient: Refers to the relative change in current flowing through the varistor when the temperature changes while the voltage across the varistor remains constant. 3. Nominal voltage: Refers to the voltage value across the varistor when DC current passes through it. 4. Voltage ratio: Refers to the ratio of the voltage generated by the current of the varistor to the voltage generated by the current of the varistor. 5. Maximum limiting voltage: Refers to the highest voltage value that the varistor can withstand across its terminals. 6. Leakage current: Also known as standby current, it refers to the current flowing through the varistor at a specified temperature and maximum DC current. 7. Residual voltage ratio: When the current through the varistor is a certain value, the voltage generated across its terminals is called the residual voltage for that current value. The residual voltage ratio is the ratio of the residual voltage to the nominal voltage. 8. Surge current capacity: Also known as surge current, it refers to the maximum pulse (peak) current value allowed to pass through the varistor under specified conditions (specified time intervals and number of times, applying standard impulse current). 9. Static capacitance: Refers to the inherent capacitance of the varistor itself. 10. Insulation resistance: Refers to the resistance value between the leads (pins) of the varistor and the insulated surface of the resistive body. 20. Voltage nonlinearity coefficient: Refers to the ratio of the static resistance value to the dynamic resistance value of the varistor under a given applied voltage.

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