What is the control of high resolution enhanced pulse width modulation?
Controlled by three 8-bit high-resolution registers.
These high-resolution enhanced pulse width modulation (HRPWM) registers and l6-bit time base phase register (TBPHS), time base period register (TBPRD) and count comparison A register (CMPA) are used to control PWM operation.
Depending on the role of the FPGA in the configuration circuit, how many ways can the configuration data be loaded into the target device?
The following three methods can be used: FPGA active (Active) method; FPGA passive (Passive) method; JTAG method.
What is the principle of the 8-digit digital tube?
Each segment of the eight-segment digital display tube is a light-emitting diode.
What can brain magnetic wave measurement reflect?
MEG measurements can reflect changes in neural activity on the millisecond time scale.
It can be used to study the dynamic behavior of the human brain, such as the brain function of the evoked stimulus response. It can also be used to locate the focus of diseases such as epilepsy.
What is the detection method for the outside temperature sensor?
Turn off the ignition switch, and unplug the outside temperature sensor wiring connector.
The outside temperature sensor is located at the top of the blower motor assembly. Use a multimeter to check the resistance between the two terminals of the outside temperature sensor, and the resistance value is 25.
The normal value of C is 4k. Q. If the measured value does not match the above normal value, it means that the outside temperature sensor is faulty and should be replaced with a new one.
What is a subtraction order?
Subtraction instruction is divided into SUB instruction without C and SBC instruction with C.
The SUB instruction subtracts an immediate value or a value in a storage location from the value in the accumulator.
The SBC instruction also subtracts the value of C in the CCR, and the difference is finally stored in the accumulator A.
What is the composition of the strain strain gauge sensor?
Metal strain gauge (resistance strain gauge) sensors are composed of elastic elements, metal strain gauges and other accessories.
What are the main technical characteristics of the MAXl595 charge pump?
- Only 3 ceramic capacitors are required externally.
- No inductor is required.
- Up to l25mA output current.
- Stable ±3% output voltage.
- 1MHz switching frequency.
- 1.8 ~ 5.5V input voltage range.
- 220.
What is an opto-isolator?
The photoelectric isolator realizes the isolation of the analog system and the digital system by the photoelectric isolation chip. It has the function of anti-interference.
What is an air switch？
Automatic air switch, also known as low-voltage circuit breaker, can be used to switch on and off load circuits, and can also be used to control motors that start infrequently. Its function is equivalent to the sum of some or all of the functions of the knife switch, over-current relay, voltage loss relay, thermal relay and leakage protector. It is an important protective device in the low-voltage distribution network.
Automatic air switch has a variety of protection functions (overload, short circuit, undervoltage protection, etc.), adjustable action value, high breaking capacity, convenient operation, safety, etc., so it is widely used at present. When short-circuited, the aromatic insulator around the static contact vaporizes to cool and extinguish the arc, and the arcing distance is zero. The arc extinguishing chamber of the circuit breaker adopts a metal grid structure, and the contact system has a repulsive current limiting mechanism. Therefore, the circuit breaker has high breaking capacity and current limiting capacity. With double release.
The inverse time limit action is that the bimetal sheet is heated and bent to make the tripper move, and the instantaneous action is that the iron core street iron mechanism drives the tripper to move. There are three types of tripping methods: thermal tripping, electromagnetic tripping and compound tripping. When a short circuit or severe overload current occurs in the line, the short circuit current exceeds the instantaneous trip setting current value. The electromagnetic tripper generates enough suction force to attract the armature and hit the lever, so that the clasp rotates upward around the rotating shaft seat and disengages from the lock.
Under the action of the reaction force spring, the lock catch breaks off the three pairs of main contacts and cuts off the power supply. When the line is generally overloaded, the overload current cannot make the electromagnetic tripper operate. But it can make the heating element generate a certain amount of heat, impel the bimetal sheet to bend upward when heated, and push the lever to disengage the clasp from the lock. Break the main contacts, cut off the power supply, and close the main contacts through the operating mechanism (manual or electric). Its contact system can not only connect or cut off the normal working current because it is equipped with an arc extinguishing device. It can also quickly cut off the fault current several times larger than the normal working current when a fault occurs, so as to effectively protect the electrical equipment in the circuit. The tripping mechanism of the switch is a set of connecting rod devices.
When the main contact is closed by the operating mechanism, it is locked in the closed position by the lock hook. If a fault occurs in the circuit, the relevant release will act to disengage the latch hook in the release mechanism. Then the main contact breaks off quickly under the action of the release spring. According to the different protection functions, the release can be divided into overcurrent release and voltage loss release.
Under normal circumstances, the armature of the overcurrent release is released. In the event of a serious overload or short circuit fault, the coil connected in series with the main circuit will generate a strong electromagnetic attraction to attract the street iron downwards and push away the lock hook, so that the main contact is disconnected. The work of the undervoltage release is just the opposite. When the voltage is normal, the electromagnetic attraction attracts the armature, and the main contact can be closed. Once the voltage drops severely or the power is cut off, the armature is released to open the main contacts. When the power supply voltage returns to normal, it must be re-closed before it can work, realizing the voltage loss protection.
The air switch is a switch that will trip as long as there is a short circuit and the switch forms a circuit. There are three types of tripping methods: thermal tripping, electromagnetic tripping and compound tripping. When the line is generally overloaded, although the overload current cannot make the electromagnetic tripper operate, it can make the heating element generate a certain amount of heat. Prompt the bimetal sheet to bend upward when heated, push the lever to disengage the clasp from the lock, break the main contact and cut off the power supply. When a short circuit or severe overload current occurs in the line, the short circuit current exceeds the instantaneous trip setting current value. The electromagnetic tripper generates enough suction force to attract the armature and hit the lever, so that the clasp rotates upward around the rotating shaft seat and disengages from the lock. Under the action of the reaction force spring, the lock catch breaks off the three pairs of main contacts and cuts off the power supply.
The tripping mechanism of the switch is a set of linkages. When the main contact is closed by the operating mechanism, it is locked in the closed position by the lock hook. If a fault occurs in the circuit, the relevant release will act to disengage the latch hook in the release mechanism. Then the main contact breaks off quickly under the action of the release spring. According to the different protection functions, the release can be divided into overcurrent release and voltage loss release.
Under normal circumstances, the armature of the overcurrent release is released. In the event of a serious overload or short circuit fault, the coil connected in series with the main circuit will generate a strong electromagnetic attraction to attract the street iron downwards and push away the lock hook, so that the main contact is disconnected. The work of the undervoltage release is just the opposite. When the voltage is normal, the electromagnetic attraction attracts the armature, and the main contact can be closed. Once the voltage drops severely or the power is cut off, the armature is released to open the main contacts. When the power supply voltage returns to normal, it must be re-closed before it can work, realizing the voltage loss protection. Because there are many insulation methods, there are oil switches, vacuum switches and other inert gas (sulfur hexafluoride gas) switches. Air is used to extinguish the arc generated during the switching process. So it is called air switch. The air switch is a switch that uses air to extinguish the arc, so it is called an air switch.
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