Ir is overload long delay current setting value; Isd is short circuit short delay setting current value; tr is the overload long delay setting time. There are frame grade current and shell grade current, tr is generally in overload (that is, more than Ir), follow the (already set) inverse time curve, factory verification, 2Ir or other times the corresponding time, also on this inverse time curve.
S, P, F, J, and X are symbols in an electrical diagram and have the following meanings: S represents a power supply, usually a battery or power socket. P stands for switch, usually used to control the switch of the circuit. F representationFuse, used to protect the components in the circuit from being damaged by current overload. J stands for terminal, which is used to connect the wires in the circuit. The X stands for connector and is typically used to connect different parts of a circuit or interfaces between different devices.
Fire line: represented by L, is the abbreviation of English Live. Zero line: represented by N, is the abbreviation of English Null, also known as Neutral line, English: Neutral. Ground: represented by E, is the abbreviation of the English Earth. U stands for rectifier (UR), V stands for voltage, A stands for ammeter, I stands for current, K generationMeter relay (KA), W stands for wattmeter.
Gather basic circuit diagram symbols, such as batteries, ground wires, diodes, etc., to meet the needs of basic circuit drawing. The basic circuit symbol is used to connect the components and play the role of "bridge interworking". Basic integrated circuit components represented by registers, converters and counters are more common in circuit diagrams. Used to represent the properties of a circuit, such as pulse, material, temperature, etc.
1, Chongqing electronic components market in 220 Xinhua Road. Electronic components are components of electronic components and small machines and instruments, which are often composed of several parts and can be used in similar products; It often refers to some parts of electrical appliances, radios, meters and other industries, and is a general term for electronic devices such as capacitors, transistors, spring wires, and so on. Common are diodes and so on.
2, to the station post building behind the Wuyi East Street to buy, there are several places to sell radio parts.
3, spare parts wholesale company units are specialized in bulk spare parts trading business activitiesThe company. Parts, non-detachable individual parts that make up machinery and machines, the manufacturing process of which generally does not require an assembly process. Such as shaft sleeve, bearing shell, nut, crankshaft, blade, gear, CAM, connecting rod body, connecting rod and so on. Spare parts are the basic unit in the machinery manufacturing process.
4. Apliu Street is located between Yen Chow Street and Nam Cheong Street and got its name because it was covered with Apliu in the early years. Apliu Street is a place specializing in the sale of electronic products, in addition to mobile phones, there are also radio equipment, audio and video products and electronic parts for sale. Ailiao Street and Synda Plaza, also have cheaper parallel products for sale, there are many tourists everyWhen I travel to Hong Kong, I also like to take a trip to Ailiao Street to see if I have found my favorite second-hand mobile phone.
1, when making a small spark gap Tesla coil (SGTC), the height is about 40 cm, and the specific height is affected by a variety of factors. The required materials include high voltage pack, enamelled wire, metal ball, PVC pipe, transistor, resistor, insulating board, battery, capacitor and glue. During the production process, it is recommended to follow the provided data and avoid modification.
2The SGTC, full name Single-Grid Tesla Coil, consists of several key components: an induction coil, a transformer, a fire starter, two large capacitors, and a primary coil that contains only a few coils of transformers. Its basic working principle is to raise the ordinary voltage through the transformer, and then through the bipolar coil, to achieve the artificial lightning generated from the discharge terminal.
3, small SGTC (Spark Gap Tesla Coil, spark gap Tesla coil) usually use high voltage pack as a power source. Because there are many sources of high voltage packsThe price is low (generally the smallest high voltage pack price is only 5 yuan, the larger one is generally not more than 20 yuan), the output voltage is high (the output can generally reach more than 10000V after driving), and the output is DC (the high voltage pack internal silicon pile). These advantages make high voltage packs the best choice for small SGTC.
4, diameter 0.25mm enamelled wire 200m. Try to use copper, such a small coil, no need to use aluminum... Diameter 2mm enamelled wire three meters. Three meters should be about right. It's a 12-centimeter metal ball, and that's where you get security Windows and stuff like thatI'll buy it. And it's not expensive. In theory, it's only ten dollars.
5, SISGTC (Sidac-IGBT SGTC) = trigger diode Tesla coil by the trigger diode -IGBT tube circuit group to replace the traditional spark gap work, to eliminate the purpose of ignition noise.
1. Add capacitive filtering near the commutator where the DC motor power line is introduced; A reactor is inserted into the power line; Motor housingReliable grounding; Current 10A is not large, you can consider using a shielded cable. Note: Power line refers to the motor control system output to the motor line.
2, the capacitor can only eliminate the radio interference generated by the brush spark, and has no effect on the motor life. Brush motor life is mainly affected by brush wear and rotor reversing groove wear.
3, shielding the use of conductive or magnetic materials made of box or shell shielding, the interference source or interference object surrounded by cutting or weakening the interference field space coupling channel, prevent the transmission of electromagnetic energy. The nature of the interference field shielded on demandDifferent, can be divided into electric field shielding, magnetic field shielding and electromagnetic field shielding.
4, when the DC motor is running, the armature coil constantly transfers from the N pole to the S pole, at this time, the coil current constantly changes the direction, then the brush undertakes the commutation task, the commutation is likely to generate sparks between the brush and the commutator, the spark will emit high-frequency electromagnetic waves, will interfere with the radio equipment.
5, DC motor capacitor, should be a brush motor. When the brush motor is running, sparks will be generated between the brushes, and the sparks contain complex electromagnetic interference, which will significantly affect other electrical equipment, especially radio devices.