Polestar says it qualifies for separate $7,500 federal EV tax credit from Volvo parent

Electric car maker Polestar will qualify for the $7,500 federal tax credit, and the company says it will do so separately from parent company Volvo. This would ensure both Polestar and Volvo could both sell 200,000 EVs before the credit begins to phase out. Let’s see how this works…

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Source: Charge Forward

Review: The Jetson Quest electric scooter improves on what others are missing

The Jetson Quest electric scooter is the latest two-wheeled EV that I’ve had the chance to try out. On the surface it may seem like any other electric scooter, but a closer look reveals some nice features that other electric scooters are lacking.

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Source: Charge Forward

Ryobi’s new electric self-propelled lawn mower gets first discount, plus smart plug deals, generators and more

Home Depot offers the Ryobi 21-inch 40V Self-Propelled Lawn Mower for $527.12 shipped. That’s down from the usual $599 price tag and the best offer we’ve tracked in 2019. Ryobi’s SMART TREK line features upgraded specs from its more entry-level line of mowers with a self-propelled design. Features a bulit-in light and automatically adapting speeds for the self-propelled portion of this mower. Ships with a 6Ah battery and wall charger. Rated 3.7/5 stars. Head below for more.

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Source: Charge Forward

Silicon Lab’s new isolated amplifiers ensure precise current and voltage measurements with ultra-low temperature drift

Semiconductor company Silicon Labs has introduced a family
of isolated analog amplifiers, voltage sensors and delta-sigma modulator (DSM)
devices designed to provide accurate current and voltage measurement with very
low drift across temperature.

The Texas-based company says the Si89xx family provides
flexible voltage, current, and output options to help developers reduce BOM
cost and shrink board space. The products are designed for industrial and green
energy applications, including EV battery management and charging systems,
DC-DC converters, and motor inverters.

To maximize efficiency and respond quickly to faults or
changes in load, system controllers require current and voltage information
from high-voltage rails. Silicon Labs’ isolation technology keeps controllers
safe across wide temperature variations with 1,414 V working voltage and 13 kV
bipolar surge.

Silicon Labs says the Si89xx devices provide up to three times higher common-mode transient immunity than competing products. The company also says the devices’ 75 kV/µs immunity to fast transients ensures reliable and accurate current readings in industrial applications. The Si89xx family supports a fail-safe indication to the host controller if the high-side supply voltage is not detected.

The devices provide typical offset error as low as ±40 µV and ±0.1% gain error, enabling precise measurements. Typical offset drift as low as ±0.15 µV/˚ C and typical gain drift as low as -6 ppm/˚ C ensure accuracy across temperature. The devices offer typical signal-to-noise ratio of up to 90 dB. A low-power mode automatically reduces current draw on one side of the isolation barrier to approximately 1 mA whenever voltage is removed from the other side, enabling a controller to manage power with a simple field-effect transistor.

Silicon Labs VP Brian Mirkin said, “Our isolation products continue to replace traditional optocouplers and outperform competing digital isolators, enabling higher surge performance, reliability, integration and safety for system designs requiring protection from high voltages.”

Source: Silicon Labs


Source: Electric Vehicles Magazine