uesa electrical components Germany uesa model uesa price

uesa electrical components are instruments that measure by converting high primary current to low secondary current based on the principle of electromagnetic induction. A current transformer consists of a closed iron core and windings. Its primary winding has very few turns and is connected in series in the circuit where the current needs to be measured. Therefore, the full current of the line often flows through it. The secondary winding has more turns and is connected in series in the measuring instrument and protection circuits. When the current transformer is in operation, its secondary circuit is always closed, so the impedance of the coils connected in series in the measuring instrument and protection circuits is very small, and the operating state of the current transformer is close to a short circuit. The current transformer converts high primary current to low secondary current for measurement; the secondary side must not be open-circuited. The principle of the current transformer is based on electromagnetic induction. A current transformer consists of a closed iron core and windings. Its primary winding has very few turns and is connected in series in the circuit where the current needs to be measured, so the full current of the line often flows through it. The secondary winding has more turns and is connected in series in the measuring instrument and protection circuits. When the current transformer is in operation, its secondary circuit is always closed, so the impedance of the coils connected in series in the measuring instrument and protection circuits is very small, and the operating state of the current transformer is close to a short circuit.

uesa electrical component principles

Electrodynamic loudspeakers, also known as moving-coil loudspeakers, are electroacoustic transducers applying the electrodynamic principle. They are the most widely used loudspeakers, primarily for three reasons: 1. Electrodynamic loudspeakers have a simple structure and are easy to manufacture. They do not require large space, resulting in low prices and widespread adoption. 2. These loudspeakers can achieve excellent performance, obtaining uniform frequency response in the mid-frequency range. 3. These loudspeakers are continuously improving. Decades of loudspeaker development history reflect continuous improvements in design, craftsmanship, and materials, as well as performance advancements over time. Electrodynamic loudspeakers are mostly cone-shaped or dome-shaped. The structure of a cone loudspeaker can be divided into three parts: 1. The vibration system includes the diaphragm, voice coil, centering spider, and dust cap. 2. The magnetic circuit system includes the upper pole plate, pole piece, lower pole plate, and magnet. 7. The auxiliary system includes the basket, surround, terminal board, and phase plug. According to Faraday's law, when a current-carrying conductor passes through a magnetic field, it experiences an electromagnetic force. Its direction conforms to Fleming's left-hand rule, with the force perpendicular to both the current and the magnetic field directions. The magnitude of the force is proportional to the current, wire length, and magnetic flux density. When alternating audio current is input to the voice coil, the voice coil receives an alternating driving force, producing alternating motion. This drives the paper cone to vibrate, repeatedly pushing air to produce sound.

uesa electrical component characteristics

Resolution refers to the ability of a sensor to detect the smallest change in the measured quantity. That is, if the input changes slowly from a non-zero value, the sensor output will not change when the input change does not exceed a certain value, meaning the sensor cannot resolve this change in input. Only when the change in input exceeds the resolution will the output change. Typically, the resolution at different points within the full-scale range of a sensor is not the same. Therefore, the maximum change in input within the full scale that causes a step change in output is commonly used as the indicator for measuring resolution. If the above indicator is expressed as a percentage of the full scale, it is called resolution. Resolution has a negative correlation with sensor stability.

uesa electrical component principles

When high-frequency current flows through a conductor, electric and magnetic fields are generated in the surrounding space. Based on the spatial distribution characteristics of the electromagnetic field, it can be divided into the near field, intermediate field, and far field. Let R be the distance from a point in space to the conductor. The region where R ﹤﹤ λ/2π is called the near field. In this region, the electromagnetic field is closely related to the current and voltage in the conductor. The region where R﹥﹥λ/2π is called the far field. In this region, the electromagnetic field can propagate away from the conductor into space. Its changes lag behind the current and voltage on the conductor by a period of time. At this point, the propagated electromagnetic waves are no longer directly linked to the current and voltage on the wire. The electromagnetic field in this region is called the radiation field. It must be pointed out that when the length of the wire L is much smaller than the wavelength λ, radiation is very weak. When the length of the wire L increases to be comparable to the wavelength, the current on the wire increases significantly, thereby forming stronger radiation. Transmitting antennas utilize this property of the radiation field to allow transmitted signals to radiate fully into space after passing through the transmitting antenna. How can a conductor become an effective radiating system? Here we first analyze the situation on transmission lines. On parallel two-wire transmission lines, to ensure only energy transmission without radiation, it is necessary to guarantee symmetrical structure of the two wires, with currents at corresponding points on the lines being equal in magnitude and opposite in direction, and the distance between the two wires<π. To effectively radiate the electromagnetic field, this symmetry of the transmission line must be broken. Methods such as separating the two conductors at a certain angle or removing one side can break the conductor symmetry and produce radiation. By separating the conductors at an open-circuit transmission line or at a distance of π/4 from the terminal into a straight shape, the current on the terminal conductor becomes in-phase rather than anti-phase. This causes the radiation fields of this conductor segment at spatial points to superimpose in phase, constituting an effective radiation system. This is the simplest and most basic unit antenna, called a half-wave dipole antenna, with a characteristic impedance of 76Ω. After electromagnetic waves radiate from the transmitting antenna, they propagate in all directions. If a symmetric dipole is placed in the direction of electromagnetic wave propagation, an induced electromotive force will be generated on the antenna dipole under the action of the electromagnetic wave. If the antenna is connected to receiving equipment at this time, high-frequency current will be generated at the input terminal of the receiving equipment. Thus, the antenna acts as a receiver, converting electromagnetic waves into high-frequency current. In other words, the antenna functions as a receiving antenna. The quality of reception depends not only on the strength of the radio waves but also on the directivity of the antenna and the matching between the half-wave symmetric dipole and the receiving equipment.

Weidou Intelligent Technology specializes in selling German uesa connectors, uesa switches, uesa relays, uesa controllers, uesa plugs, uesa sensors, uesa resistors, uesa capacitors, uesa buses, uesa modules, uesa cables, uesa power supplies, uesa interfaces, uesa gateways, uesa circuit breakers, uesa original imports from Germany. Welcome customers to inquire and order.