ego elektro electrical components Germany ego elektro models ego elektro price

ego elektro electrical components are resistive devices with nonlinear voltage-current characteristics, primarily used for voltage clamping when circuits experience overvoltage, absorbing excess current to protect sensitive components. The resistive body material of varistors is semiconductor, making them a type of semiconductor resistor. The widely used "zinc oxide" varistor has a main body composed of divalent zinc and hexavalent oxygen. Therefore, from a materials perspective, zinc oxide varistors are a type of "II-VI group oxide semiconductor." In Taiwan, China, varistors are called "surge absorbers," sometimes also referred to as "electric shock (surge) suppressors (absorbers)." Varistors are voltage-limiting protection devices. Utilizing the nonlinear characteristics of varistors, when overvoltage appears across the two poles of a varistor, it can clamp the voltage to a relatively fixed value, thereby protecting downstream circuits. The main parameters of varistors include: varistor voltage, current handling capacity, junction capacitance, response time, etc. The response time of varistors is at the ns level, faster than gas discharge tubes, but slightly slower than TVS tubes. Generally, their response speed meets the requirements for overvoltage protection in electronic circuits. The junction capacitance of varistors is typically in the range of hundreds to thousands of Pf, making them often unsuitable for direct application in high-frequency signal line protection. When applied in AC circuit protection, their larger junction capacitance increases leakage current, which must be fully considered in protection circuit design. Varistors have a large current handling capacity, but smaller than that of gas discharge tubes. Varistors, abbreviated as VDR, are voltage-sensitive nonlinear overvoltage protection semiconductor components.

ego elektro electrical component characteristics

So-called dynamic characteristics refer to the output characteristics of a sensor when the input changes. In practical work, the dynamic characteristics of sensors are often expressed by their response to certain standard input signals. This is because the response of sensors to standard input signals is easily obtained through experimental methods, and there is a certain relationship between their response to standard input signals and their response to arbitrary input signals; often, knowing the former allows deduction of the latter. The most commonly used standard input signals are step signals and sinusoidal signals, so the dynamic characteristics of sensors are also commonly expressed by step response and frequency response.

ego elektro electrical component classification

Classification by application: toggle switches, band switches, record/playback switches, power switches, selector switches, limit switches, control switches, changeover switches, isolator switches, travel switches, wall switches, intelligent fire protection switches, etc. Classification by structure: micro switches, rocker switches, toggle switches, slide switches, push-button switches, key switches, as well as fashionable membrane switches and dot switches. Classification by contact type: switches can be divided into a type contacts, b type contacts, and c type contacts based on their contact types. The contact type refers to the relationship between the operating condition (pressing the switch) and the state of the contacts after operation. It is necessary to choose a switch with an appropriate contact type according to its intended use. Classification by number of switches: single-control switches, dual-control switches, multi-control switches, dimmer switches, speed control switches, splash-proof boxes, doorbell switches, sensor switches, touch switches, remote control switches, smart switches, card-operated power switches, and dedicated bathroom heater switches.

ego elektro electrical component characteristics

Operating characteristics: The main characteristics characterizing the performance of synchronous generators are no-load characteristics and load operating characteristics. These characteristics are important bases for users to select generators. No-load characteristics: When the generator is not connected to a load, the armature current is zero, referred to as no-load operation. Armature reaction: When the generator is connected to a symmetrical load, the three-phase current in the armature winding produces another rotating magnetic field, called the armature reaction magnetic field. Its rotational speed is exactly equal to the rotor speed, and both rotate synchronously. The armature reaction magnetic field of a synchronous generator and the rotor excitation magnetic field can both be approximately considered to be distributed according to a sinusoidal law. The spatial phase difference between them depends on the time phase difference between the no-load electromotive force E0 and the armature current I. The armature reaction magnetic field is also related to the load condition. When the generator load is inductive, the armature reaction magnetic field has a demagnetizing effect, causing the generator voltage to decrease; when the load is capacitive, the armature reaction magnetic field has a magnetizing effect, causing the generator output voltage to increase. Load operating characteristics: Mainly refer to external characteristics and adjustment characteristics. External characteristics describe the relationship between the generator terminal voltage U and the load current I when the speed is at the rated value, and the excitation current and load power factor are constant. Adjustment characteristics describe the relationship between the excitation current If and the load current I when the speed and terminal voltage are at rated values, and the load power factor is constant.

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