Questions tagged [inductive]
In the context of electronics, inductive refers to circuits that use magnetic fields, for things such as power or data transfer or sensing metal objects
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Relay coil with zener diode having Vz>Vcoil: how to drive coil?
Short question:
How to drive a relay when using diode + zener across the coil (for fast demagnetization) but the zener voltage is greater than the drive voltage?
Long question:
When driving a relay (...
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How to characterize ringing?
This is a very conceptual question without a specific example so I hope to articulate my confusion by two categories:
Lumped circuit model:
In a lumped circuit model, when the inductor and capacitor ...
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Voltage Spikes with PWM Controlled Brushed Motor
I have disassembled a 20V cordless drill. It uses a two-lead brushed motor controlled via a PWM signal. Out of curiosity I connected both motor leads to an oscilloscope and measured both against a ...
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Why the drain voltage of a power MOSFET undergoing an unclamped inductive load switching test is not 0 V at the end of a LTspice simulation?
I am designing an unclamped inductive load Switching tester for DUTs at 3.3 kV. I am experiencing a problem in LTSpice simulations where the drain voltage of the power MOSFET under test is stuck at a ...
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Is a TVS diode enough to protect BMS MOSFETs from motor inductive kickback?
I’m working on an EV 2-wheeler project (48 V system).
On the BMS side I don’t yet have protection designed for motor inductive kickback, but I want to test the setup without damaging my BMS MOSFETs.
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Confused about voltage at motor terminal with freewheeling diode during inductive kickback
I know this is a basic concept, but I still don’t fully understand it. In my circuit, when the high-side MOSFET switches off, I expect the motor terminal (point A) to go negative due to
V= L*(di/dt)
.
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How do I protect MOSFETS against inductive kickback?
I have a 48 V battery powering a motor. On the high side I use two MOSFETs in a back-to-back, common-source configuration (to block body-diode conduction). Each MOSFET is rated BVDSS = 80 V. The gate ...
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Inductive slip ring on a PCB
I need to read and power a sensor on a rotating PCB at a data rate of around 100 kbit/s and <0.5 W. Due to space constraints I'm exploring designing a pair of PCBs and do this inductively. The two ...
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Any idea why circuit D would not be recommended for energizing the relay coil?
I am planning on using the G8G-1SV DC24 relay in a product, and for switching relay coils, I always just place a diode in parallel with the coil, to keep current flowing momentarily when the relay is ...
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Are flyback diodes (D1 and D2) necessary in this H-bridge relay circuit?
I'm analyzing the H-bridge relay circuit shown below and trying to understand whether the flyback diodes D1 and D2 are truly necessary.
At first glance, I wondered if they were redundant, since both ...
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How to protect relay contact when use inductive load?
Hi friend, I control a solenoid valve coil 24VDC 1.5amps like this circuit. When the relay switching on, I can see the arc at the contact point. But when switching off have no arc. Can I reduce or ...
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Can I use the 1N5822 diode with 5A inductive loads (non-PWM), and 1N5824 for PWM-driven coils?
I’m working with 12V inductive loads (coils) that draw 5A, and they are switched using MOSFETs. I have two different cases:
1. Non-PWM switching:
Some coils stay energized for long periods (e.g., 20 ...
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How to design a LC filter for a inductive load?
I want to use a coil to generate an alternating magnetic field at around 10 kHz, and I’d like to suppress high-frequency noise from the AC power supply using an LC filter.
However, most filter design ...
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Spurious rising edges on 20 meter long GPIO cables into Raspberry Pi via opto isolator
I have a number of binary input channels at 13.8v level running into a Raspberry Pi via a CNY74-4H Transistor Output Optocoupler. I have pull down resistors on the inputs to the Optocoupler, and I'm ...
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Transients at an ESC powered with 12VDC over long wires
Suppose that we are forced by dumb requirements to supply low-voltage DC power over long (25m) wires to an ESC and its brushless DC motor (I know this is bad practice). The supply wiring inductance ...
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