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Bidirectional Charger.
Bidirectional chargers can be used for two different applications. The first and most talked about is Vehicle-to-grid or V2G, designed to send or export energy into the electricity grid when the demand is high. If thousands of vehicles with V2G technology are plugged in and enabled, this has the potRead more
Bidirectional chargers can be used for two different applications. The first and most talked about is Vehicle-to-grid or V2G, designed to send or export energy into the electricity grid when the demand is high. If thousands of vehicles with V2G technology are plugged in and enabled, this has the potential to transform the way in which electricity is stored and generated. EVs have large, powerful batteries, so the combined power of thousands of vehicles with V2G could be enormous.
Vehicle-to-grid or V2G – exports energy to support the electricity grid.
Vehicle-to-home or V2H – energy is used to power a home or business.
The second use of bidirectional chargers is for Vehicle-to-home or V2H. As the names suggest, V2H enables an EV to be used much like a home battery system to store excess solar energy and power your home.
Vehicle-to-grid – V2G
Vehicle-to-grid is where a portion of the EV battery energy is discharged and exported to the electricity grid when the demand is high in exchange for an incentive or reduced electricity costs, depending on the service contract. To participate in V2G programs, you will require a bidirectional DC charger and a compatible EV.
Vehicle to Home – V2H
Vehicle-to-home or V2H is similar to the V2G, but the energy is used locally to power a home instead of being fed into the electricity grid. This enables the EV to function much like a regular household battery system to help increase self-sufficiency, especially when combined with rooftop solar. Another benefit of V2H is the ability to provide backup power in the event of a blackout.
See lessMosfet Selection
RDS(ON) parameters RDS(ON) means “resistance between drain and source in conduction.” MOSFETs are generally used as a better alternative to power transistors and are used for high-current–switching applications. If this parameter is lower, it means that the MOSFET loses less energy, according to OhmRead more
RDS(ON) parameters
RDS(ON) means “resistance between drain and source in conduction.” MOSFETs are generally used as a better alternative to power transistors and are used for high-current–switching applications. If this parameter is lower, it means that the MOSFET loses less energy, according to Ohm’s law, and results in higher energy efficiency and produces less heat. The designer should choose a component model with the lowest possible RDS(ON) value. when the MOSFET is conducted, the RDS(ON) can be calculated with the formula: RDS(ON) = V(DS) / I(D)
Input (Ciss) and output (Coss) capacitance parameters
The “gate,” the oxide layer, and the relative connection on the MOSFET body works, in effect, like a small capacitor. As soon as the “gate” is subjected to a voltage, this virtual capacitor begins to charge. Charging takes time, and therefore, there is a delay in the on state. The designer should choose a MOSFET with the lowest possible input capacitance to avoid long delays. If using a MOSFET with a direct connection to an MCU output pin, the “gate” should be connected via an external resistor to prevent unwanted results. Regarding the SiC model used, its capacitive parameters are as follows:
Input capacitance (Ciss): At VDS = 100 V, VGS = 0 V, F = 100 kHz — 1,500 pF
Output capacitance (Ciss): At VDS = 100 V, VGS = 0 V, F = 100 kHz — 104 pF
Parameters related to switching speed
MOSFETs are particularly suitable for fast-switching applications. The higher the frequency, the smaller the transformers must be, but the transmitted noise increases. In parameters that link the component to the switching speed are as follows:
Turn-on delay time (tdon): 25 ns
See lessRise time (tr): 14 ns
Turn-off delay time (tdoff): 54 ns
Fall time (tf): 11 ns
Mosfet Selection
In MOSFET selection, 1. Maximum drain-source voltage, 2. Peak current, 3. Loss due to the ON-resistance (Ron), 4. Maximum allowable power dissipation 5. Lowest input capacitance possible to avoid long delays and to minimize in-rush current which can be very high initially but lessens as the capacitoRead more
In MOSFET selection,
See less1. Maximum drain-source voltage,
2. Peak current,
3. Loss due to the ON-resistance (Ron),
4. Maximum allowable power dissipation
5. Lowest input capacitance possible to avoid long delays and to minimize in-rush current which can be very high initially but lessens as the capacitor charges
Diode selection
Umesh, Please find attached the file for the selection of the TVS diode. You will understand what parameters need to check & how it works to protect the device from surge spike.
Umesh,
Please find attached the file for the selection of the TVS diode. You will understand what parameters need to check & how it works to protect the device from surge spike.
See lessDiode selection
To select a TVS diode, follow these steps: Select a diode with a standoff voltage that is higher than the normal operating voltage. Ensure that the TVS diode maximum clamping voltage is less than the abs max rating of all the devices on the line to be protected. It is important to consider operationRead more
To select a TVS diode, follow these steps:
dp version 2 interface error
Hello, To create or debug the CSV file, we need to configure dot DP vision with an updated version & related XDPL series. We need to download images & Waveform data of the XDPL part & copy them into a folder of images.
Hello,
To create or debug the CSV file, we need to configure dot DP vision with an updated version & related XDPL series.
We need to download images & Waveform data of the XDPL part & copy them into a folder of images.
See lessPower data in XDPL Series
Hello Madam, In the XPDL series, we need to design hardware components(Magnetics) in a simulation file or manually using an application note & need to implement the same in a CSV file. If we configure different CSV files with different Hardware data it will not work properly. To read POWER dataRead more
Hello Madam,
In the XPDL series, we need to design hardware components(Magnetics) in a simulation file or manually using an application note & need to implement the same in a CSV file.
If we configure different CSV files with different Hardware data it will not work properly.
To read POWER data from a CSV file, we have hardware configuration data in the interfacing program file.
LED flood light
Hello Mr. Jagmohan, Please share a Schematic of your input protection circuit, & please let us know what failure is getting or components are damaged after the surge (e.g Fuse burned, MOV burned, Mosfet short, or track burned). If Mosfet is getting damaged - then we need to work on a selection oRead more
Hello Mr. Jagmohan,
Please share a Schematic of your input protection circuit, & please let us know what failure is getting or components are damaged after the surge (e.g Fuse burned, MOV burned, Mosfet short, or track burned).
Stricker
Hello, Please share the schematic of DOB. if you are using MOV please mention part no. If you are not using MOV, you need to add MOV between L-N.
Hello,
Please share the schematic of DOB. if you are using MOV please mention part no.
If you are not using MOV, you need to add MOV between L-N.
See less