In electronics, a chopper circuit is used to refer to numerous types of electronic switching devices and circuits used in power control and signal applications. A chopper is a device that converts fixed DC input to a variable DC output voltage directly.
How do boost converters work?
In a boost converter, the output voltage is always higher than the input voltage. A schematic of a boost power stage is shown in Figure 1. (a) When the switch is closed, current flows through the inductor in clockwise direction and the inductor stores some energy by generating a magnetic field.
A duty cycle is the fraction of one period in which a signal or system is active. Duty cycle is commonly expressed as a percentage or a ratio. A period is the time it takes for a signal to complete an on-and-off cycle.
Chopper Gun & Roving. A Chopper Gun is used to automatically chop and deposit fiberglass gun roving strands or carbon tow strands into a mold or composite part. The Chopper Gun makes it easy to quickly cover large surfaces with fiberglass.
The chopper is turned ON when the flow of current spreads the minimum level. This technique can be utilized either when the ON time 'T' is endless or when the frequency f=1/T. Thus, this is all about the differences between time ratio control and current limit control.
Helicopter rotor chops or cuts the air to produce required the lift and hence the name chopper is used for a helicopter. Incidentally, 'chopper' is used for a semiconductor device called 'thyristor' because of its ability to chop the sin-osoidal wave at a desired location.
The word "chopper" can simply be used for any rapper that uses a fast-paced style in his or her lyrics. The term was first used in street and hip hop slang to refer to the AK-47 assault rifle. The word has also been used as an informal word for helicopter.
Dual Converter is an Electronic Device or Circuit made by the combination of two bridges. One of them works as Rectifier(Converts A.C. to D.C.) and other bridge works as Inverter(converts D.C. into A.C.). Thus an electronic circuit or device in which two processes take place at same time, is known as Dual Converter.
SEMI CONVERTER ? It is a single quadrant converter. ? It has only one polarity of output voltage and current. ? Here two SCRs and two diodes are connected in bridge configuration. ? They can be arranged in two confg.
The single phase fully controlled rectifier allows conversion of single phase AC into DC. Normally this is used in various applications such as battery charging, speed control of DC motors and front end of UPS (Uninterruptible Power Supply) and SMPS (Switched Mode Power Supply).
3. 2.4 Single Phase Half Wave Controlled Rectifier with RL Load ? The circuit consist of a thyristor T, a voltage source Vs, an inductive load L and a resistive load R. ? During the positive half cycle of the input voltage, the thyristor T is forward biased but it does not conduct until a gate signal is applied to it.
Phase Controlled Rectifiers are used for converting ac to dc using thyristors. They can also be additionally used for changing constant ac input voltage to Controlled dc output voltage. After the gate signal is removed and the supply voltage now reverse biases and stops the conduction.
A rectifier is a circuit which converts the Alternating Current (AC) input power into a Direct Current (DC) output power. The input power supply may be either a single-phase or a multi-phase supply with the simplest of all the rectifier circuits being that of the Half Wave Rectifier.
Full wave rectifier is a type of rectifier which converts alternating current voltage into pulsating direct current voltage during both half cycles of applied input voltage. In this rectifier, full wave rectification can be achieved by using two crystal diodes which conduct current alternatively.
Rectifiers are normally used in circuits that require a steady voltage to be supplied. To provide a steady DC output. The raw rectified DC requires a smoothing capacitor circuit to enable the rectified DC to be smoothed so that it can be used to power electronics circuits without large levels of voltage variation.
Its output is a series of pulses with a frequency that is the same as the input frequency. Thus when operated from a 60-hertz line, the frequency of the pulses is 60 hertz. This is called RIPPLE FREQUENCY.
Ripple (specifically ripple voltage) in electronics is the residual periodic variation of the DC voltage within a power supply which has been derived from an alternating current (AC) source. This ripple is due to incomplete suppression of the alternating waveform after rectification.
Peak-to-peak (pk-pk) is the difference between the maximum positive and the maximum negative amplitudes of a waveform, as shown below. For an AC sine wave with no DC component, the peak-to-peak amplitude is equal to approximately 2.828 times the root-mean-square amplitude.
Ripple factor (γ) may be defined as the ratio of the root mean square (rms) value of the ripple voltage to the absolute value of the DC component of the output voltage, usually expressed as a percentage. However, ripple voltage is also commonly expressed as the peak-to-peak value.
A ripple counter is an asynchronous counter where only the first flip-flop is clocked by an external clock. All subsequent flip-flops are clocked by the output of the preceding flip-flop. Asynchronous counters are also called ripple-counters because of the way the clock pulse ripples it way through the flip-flops.
The RMS value is the effective value of a varying voltage or current. It is the equivalent steady DC (constant) value which gives the same effect. For example, a lamp connected to a 6V RMS AC supply will shine with the same brightness when connected to a steady 6V DC supply.