1. The power of the power amplifier is not hard enough. When the loud power amplifier is close to the power saturation point, all the output signals are abnormal cutting signals, which will damage the speaker. A few days ago, some netizens asked that when using the RX-V320 power amplifier to watch the U571, the power amplifier that the mines explode under water will automatically shut down. This is the power amplifier is overloaded. If the RX-V320 does not have a perfect protection circuit, the speaker may be damaged Imagine how it is possible for a transformer of about 300 va to provide 60 to 70 watts of continuous undistorted power to a 5-way amplifier at the same time. Even if the power amplifier efficiency is 99.9%, it violates the law of conservation of energy. In addition, some friends who are willing to invest in a large floor box and not a high-power amplifier should also be careful, because the frequency impedance characteristics of the large three-way floor box are more complicated, and maybe the response of the protection circuit will be slower one day ... ... It is recommended that users who prefer large volumes choose high-power amplifiers.
2. The power amplifier has a DC output. After seeing the above, some friends will ask: Imported high-power amplifiers are too expensive. Can they be replaced with domestic high-quality products? The answer is completely ok, but the previous question is that it must be a fine product in the actual sense. Those so-called boutiques with huge body, gleaming silver, and several karaoke jacks on the panel, but priced at around a thousand yuan, advise you not to take this risk. Someone tried to use an 8-tube parallel high-end product called pure class A pure DC to try to force the legendary LS3 / 5a extremely low frequency. As a result, a box was struck. After unpacking and inspection, the bass unit coil was connected to the crossover The coil burned black. The DC output of the power amplifier is equivalent to using your woofer coil and the crossover coil as an electric furnace. The middle and high tweeters are better because of the isolation of the capacitor on the crossover path. The situation is better. The main cause of DC.
3. Karaoke When singing with a microphone, the microphone will be too close to the speaker or facing the speaker. When the volume is turned up, a high-frequency positive feedback feedback will be generated. Will burn the tweeter, because the better the high-frequency response, the lighter the quality of the diaphragm and the coil. The tweeter with a very thin coil cannot withstand your lion ’s roar, and the microphone is accidentally dropped on the ground. High dynamics are also deadly, and even magnetic fluid protection will not help.
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Progressive Punching is an efficient self-riveting process of fixed rotor, which can realize large-scale and precise riveting operation and is suitable for mass manufacturing production line. The following is the introduction of progressive rotor self-riveting process:
First, determine the type and specification of the stator and rotor required for riveting, and prepare the rivets and riveting machines required for riveting. Rivet size should match the hole size of stator and rotor to ensure tight fit and firmness.
According to the size and riveting requirements of stator and rotor, the rivet is machined into the corresponding length and shape. Progressive punch riveting machine also needs to adjust, set, calibrate the position of the riveting head, pressure, speed and other parameters.
Insert the rivet into the stator hole, and start the progressive punching riveting machine with electricity. The rivet will exert force on the rivet head according to the set parameters, and form a large number of threaded processes on the inner wall of the stator hole, so that the rivet deformation is firmly connected with the stator.
Wait for the rivet deformation, riveting process is complete. The remaining rivet tail should be cut off and inspected after riveting is completed to ensure that the riveting is firm and reliable and the transmission system runs smoothly.
In general, the process of progressive impact fixed rotor self-riveting can improve the production efficiency, but also ensure the precision and stability of riveting. However, riveting machine adjustment requires specialized skills, so an operator familiar with the riveting process is required.
Motor stator riveting, beraring stator riveting, generator stator riveting
Henan Yongrong Power Co., Ltd , https://www.hnyongrongglobal.com