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mustek electrical components consist of wire wound turn by turn around an insulating tube. The wires are mutually insulated, and the insulating tube can be hollow or contain an iron core or magnetic powder core. An inductor coil is a device that operates based on the principle of electromagnetic induction. When current flows through a wire, it generates an electromagnetic field around the wire, and this electromagnetic field induces effects on the wire itself within the field range. The effect on the wire generating the electromagnetic field is called "self-inductance," meaning the changing current generated by the wire produces a changing magnetic field, which further affects the current in the wire; the effect on other wires within this electromagnetic field range is called "mutual inductance." The electrical characteristics of an inductor coil are opposite to those of a capacitor: "passes low frequencies, blocks high frequencies." High-frequency signals encounter significant resistance when passing through an inductor coil and struggle to pass; whereas low-frequency signals encounter less resistance and can pass more easily. The resistance of an inductor coil to direct current is nearly zero. Resistance, capacitance, and inductance all present certain resistance to the flow of electrical signals in a circuit; this resistance is termed "impedance." The impedance presented by an inductor coil to current signals utilizes the coil's self-inductance. Inductor coils are sometimes abbreviated as "inductance" or "coil," represented by the letter "L." When winding an inductor coil, the number of turns is generally referred to as the coil's "number of turns."

mustek electrical component performance

The main performance indicators of loudspeakers include sensitivity, frequency response, rated power, rated impedance, directivity, and distortion. (1) Rated Power: Loudspeaker power is divided into nominal power and maximum power. Nominal power, also called rated power or non-distortion power, refers to the maximum input power allowed within the rated non-distortion range of the loudspeaker. The power marked on the loudspeaker's label and technical manual is this value. Maximum power refers to the peak power the loudspeaker can withstand at any instant. (2) Rated Impedance: Loudspeaker impedance is generally related to frequency. (3) Frequency Response: When audio signals of the same voltage but different frequencies are applied to a loudspeaker, the resulting sound pressure changes. Generally, sound pressure is higher at mid-frequencies and lower at low and high frequencies. The frequency range of high and low tones where the sound pressure drops to a certain value relative to the mid-frequency is called the loudspeaker's frequency response characteristic. (4) Distortion: Distortion is the phenomenon where a loudspeaker fails to accurately reproduce the original sound. There are two types of distortion: frequency distortion and nonlinear distortion. Frequency distortion occurs when some frequencies are amplified more strongly than others, disrupting the original balance of loudness and altering the timbre. Nonlinear distortion arises because the vibration of the loudspeaker's system is not fully consistent with the signal fluctuations, adding new frequency components to the output sound waves. (5) Directivity Characteristic: This characterizes the distribution of sound pressure radiated by the loudspeaker in various spatial directions. Higher frequencies result in narrower directivity, and larger cones result in stronger directivity.

mustek electrical component principle

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, are easy to manufacture, and do not require large space, leading to low costs 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, dust cap, etc. 2. The magnetic circuit system includes the upper pole plate, pole piece, lower pole plate, magnet, etc. 6. 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 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 coil experiences an alternating driving force, producing alternating motion that drives the cone to vibrate, repeatedly pushing air to generate sound.

mustek electrical component principle

An AC power supply that provides stable voltage and frequency is called an AC stabilized power supply. Most domestic manufacturers focus on AC voltage stabilization. Below is a brief description of the classification characteristics of available AC stabilized power supplies in the market. Parameter adjustment (resonance) type: The basic principle of stabilization for this type of stabilized power supply is LC series resonance. Early magnetic saturation stabilizers belong to this category. Its advantages are: simple structure, few components, high reliability, wide stabilization range, strong anti-interference, and overload capacity. Disadvantages include: high energy consumption, high noise, heavy weight, and high cost.

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