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Description
High Speed Controller Powerful BLDCHigh Discharge High Speed Controller YYK controllers are the reliable workhorse square wave high speed controllers used in our upgraded Fiido e scooters. They are relatively cheap and easy to use without much configuration needed. [product_description] Square Wave Controller Description The YYK controller is a square wave high discharge high speed controller. Discharge current rates start from 50A all the way to 150A. And they can accommodate a
High-Discharge High-Speed Controller
YYK controllers are the reliable workhorse square wave high speed controllers used in our upgraded Fiido e-scooters. They are relatively cheap and easy to use without much configuration needed.
[product_description]
Square Wave Controller Description
The YYK controller is a square wave high discharge high speed controller. Discharge current rates start from 50A all the way to 150A. And they can accommodate a variety of voltages from 48V to 72V or 100-120V. The YYK is a universal controller which is easy to wire up and to adapt to virtually any e-bike or e-scooter drive train.
Here is how the YYK square wave controller works:
Controller Configuration via Bluetooth App
Here is how to download your YYK app to configure the wide range of parameters to adjust the power, acceleration and speed of your new YYK powered Fiido e-scooter!
Sinewave FOC Controller
Our sinewave FOC controllers are smoother and more efficient without sacrificing the torque and top speed of squarewave controllers. From launch, the sinewave foc controllers will feel more gradual and smooth whereas squarewave versions will feel more torquey and jerky.
We have available the 50A and 70A versions of the sinewave controller.
Specifications
48V-72v, max current 50A/80A/100A high powered brushless motor controller, voltage cutoff value is 42V, is suitable for 48v to 72v battery. Phase angle 120 degree. Install apps to your smart phone and use Bluetooth device available for setting the controller current, voltage, speed and other data.
| 50A Example Brushless DC Motor Controller | |||||
| 1 | Controller Wave Type | Square Wave Controller / Sinewave FOC | |||
| 2 | Available Battery Voltage | 48V, 60V, 72V | |||
| 3 | Available Motor Power | 1.5KW, 3.2kW | |||
| 4 | Phase Peak Current ( Few Seconds ) | 280 A ( The bigger, the higher torque ) | |||
| 5 | Current | 50A, 80A, 100A Peak | |||
| 6 | Available Motor Type | Hub Motor, Mid Motor, Speed Motor | |||
| 7 | Available Motor Angle | 60 / 120 | |||
| 8 | Working Frequency | 15.6 KHz | |||
| 9 | Working Efficiency | > 90% | |||
| 10 | Available Battery Type | Lithium Battery ; Acid Battery | |||
| 11 | Available Motor Type ( With Hall Sensor ) | Hub Motor; Speed Differential Motor; Mid Drive Motor | |||
| 12 | Control Method | Throttle; Potentiometer (Customized ) | |||
| 13 | Number of MOSFETS | 36 Fets | |||
| 14 | Mosfets # | IRFB 4115 / 220 | |||
| 15 | Case Material | Aluminium | |||
| 16 | Color | Siliver ( Color customization is available with mini order 200 pcs ) | |||
| 17 | Available Working Temperature | -30℃ to 100℃ ( As per surface of controller ) | |||
| 18 | Temperature Protection | 100 ℃ | |||
| 19 | Brake Signal Input | 0-5V; 12V (Customized ) | |||
| 20 | Usage 1 | Electric mobility Scooter, Bike, Tricycle, Light Car | |||
| 21 | Usage 2 ( Most is sensorless ) | Water Pump, Air Compressor; Fans, Refrigater | |||
| 22 | App Bluetooth Programmable Supports both of iPhone & Android | ||||
| 23 | Android App Download address | http://www.yuyangking.com/en/downs/7.htm | |||
| 24 | IPhone App ( Emotor /Yuyang King ) download | App Store | |||
| 25 | Weight | 2.5 Kgs | |||
| 26 | Dimension | 340 * 117 * 60 mm | |||
| 27 | Waterproof Grade | IP 65 | |||
Programmable Features:
- Specially designed for electric bicycle, scooter etc.
- Intelligence with powerful microprocessor.
- 5V Sensor Supply Current: <30mA.
- Standby Battery Current: < 0.5mA.
- Hardware over Current Protection while Current over 100A – 110A.
- Hardware over Voltage Protection while Voltage over 144V.
- Configurable Fast Start 1-10 ,the bigger, the faster. This is higher priority than Soft Start.
- Configurable Soft Start 1-10, the bigger the number, the softer.
- Configurable Over Speed On / Off . Configurable Speed Ratio ( High Speed ) 105 % – 120%. Configurable Low Speed Ration 10% – 80 %. Middle Speed is 100 % as Default. It cannot be configurable.
- Adjustable Forward / Reverse. It is easy for motor assembling.
- Adjustable Manual Cruise. It is workable with a switch to connect manual cruise wires of controller.
- Adjustable Auto Cruise. It will enter cruise mode when same speed is kept for 8 seconds.
- Configurable Speed Limited 30% – 60 % of full speed.
- Configurable Reverse Speed Limited 10 % – 100 %.
- Configurable Speed Limited from 30% – 60 % of full speed.
- Configurable EBS Brake ( Regenerative ) 1 -10. The higher number, the stronger. It will not be used while the battery voltage above 72V to protect controller from damage.
- Configurable Battery Current Limited ( A ) 50 % – 100 % of max current. The more lower, the more weaker.
- Configurable Phase Current Limited (A ) 50 % – 100 % of Peak Current. The more lower, the more weaker.
- Adjustable of Hall Sensor Phase Angle – Option 60 degree / 120 degree.
- Turn on / off ECO Mode, on this mode, one charger battery will be run longer.
- Turn on / off Adj Accelerator Curve. It will be going to tremble. Please don’t use this feature for normal driver. It is for players only.
- Turn on / off of Boost . It is to the off road.
- Configurable Low Voltage Threshold ( Low voltage Protection ) 50V – 105V.
- Turn On / Off Motor Lock. The motor will be locked if turn on it while the battery has power.
- Turn On / Off Restore Factory Settings.
Motor Connection
If you have any issues with the controller to motor connection, do follow these steps to configure your motor to your high speed controller especially if you experience the motor jerkiness or motor not moving.
[/product_description]
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
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- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 2210 reviews
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Product Reviews
★★★★★ 5
A must have for the serious tracker!
Format: Kindle
8/23/19 Edit: Original review based only on Kindle version, but since receiving my paper copy, I've edited it throughout. Overall I am even more enthusiastic about it. I'm a bit of a dinosaur and rarely use Kindle and I found it harder to evaluate the book without paper pages to flip through.
This is THE authoritative source for N. American mammal tracks & sign. What makes it (including 1st edn) special:
1. It is organized by type of sign rather than by species (but see below in "What's new"). This is terrific for when you've found some type of sign and can't narrow it down to a few species. Found a scat? Go to the section on scat and learn the appearance of scat left by different species so you can ID yours.
2. It's comprehensive (covers many species) and exacting (detailed measurements, meticulously researched).
3. Photos are large and clear enough to show what they intend to convey.
4. It has illustrations to help you grasp the salient features of tracks, but also photos that help you see how tracks and trails differ in different substrates.
What's new in this 2nd edition:
1. There is a final chapter called "Species Accounts" and in each account, there are detailed illustrations of feet, and photos and illustrations of tracks and track patterns. The animal's other types of sign (runs, feeding sign, etc.) are summarized verbally. The photos of those other signs are all in the other relevant chapters, but references to figure numbers are given in the Species Accounts. These Species Accounts are a dramatic improvement over the 1st edn, in which they were part of the Tracks and Trails chapter, and did not usually mention other types of sign created by each animal. The Species Accounts in the 2nd edn make it much easier for the reader to get a coherent picture of each species, so this is a dramatic improvement. Essentially the book is still organized by sign, but the Species Accounts make it far easier to navigate.
2. I mentioned above the detailed illustrations of feet, but this deserves emphasis. These are great; it really helps to be able to correlate the foot anatomy to the the track.
3. It has many new photos, which are extremely clear and illustrate the points beautifully.
4. Range maps have been omitted. This is a negative, and I imagine it was done to save space.
5. The book is, overall, much more appealing to the eye, perhaps because it is better organized. I have to admit I thought the 1st edn was a bit awkward in its organization and I sometimes found it frustrating to flip through in search of something in particular....Not the case at all in the 2nd edn.
While the species accounts now include summaries of other types of sign, they still do not provide an image of the animal, physical description, diet, breeding behavior, habitat, etc. This is not a criticism (you can't everything about mammals in one book), it is just to say that this book remains the top reference for the intermediate to advanced tracker, but not the best place for a beginner to start. If you're a beginning tracker and you don't already have a solid knowledge of each animal's appearance, range, and basic ecology, I suggest you first read one of the following, both of which are truly organized by species.
1. Camera Trapping Guide: Tracks, Sign and Behavior of Eastern Wildlife, by Janet Pesaturo -- Less comprehensive track & sign but has photos of each animals, sometimes with the animals in the act of creating the sign. It has range maps and much info on each species' ecology and behavior but not so much that it's overwhelming or unreadable. Focused on eastern US but most species also found in west. Yes, it's technically a camera trapping guide, but it's really about using track & sign knowledge to find animal hot spots (for good camera placement), so it's hugely helpful for trackers. I prefer this over Rezendes's Tracking and the Art of Seeing, which also focuses mostly on the East but has no range maps and has less about ecology and behavior.
2. The Tracker's Field Guide, by James Lowery -- Also less comprehensive than Elbroch's and MacFarland's tome, but for a tracking book it has very nice coverage of pertinent animal ecology. Focused mainly on western US but still useful for eastern US. Has both illustrations and photos, though admittedly some of the photos are a bit small or less than perfectly clear. Still, I consider it the best for the west among species by species tracking guides.
If you're a serious tracker of any level, you'll find the 2nd edition of Mammal Tracks & Sign extremely useful. As you learn tracking, it won't be long before you find some kind of sign which you can't narrow down to a couple of species. In that case, a book organized by type of sign makes it quick and easy for you to narrow it down and probably determine exact species. And, there is simply no other tracking guide that's anywhere near as comprehensive as this one. The 1st edition has been one of the most useful books in my extensive natural history library, and I'm delighted to have this updated edition. A must-have for the serious tracker!
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Reviewed in the United States on July 26, 2019
★★★★★ 5
Tons of info!
Format: Paperback
If one wanted to be a real tracker, this book has everything needed. I just want to be able to recognize the local wildlife tracks. But having all the rest of the info is nice, and it's easy to take what I want. The book is well organized. Fantastic pictures, loads of information. It's interesting too, to see just how much knowledge goes into figuring out not only what animal it is, but what sex, age, gait, etc it is. This is an awesome book.
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Reviewed in the United States on January 18, 2025
★★★★★ 5
Caveats for the professional tracker
Format: Paperback, Format: Paperback
This is a most excellent resource, arguably the best single tracking book that exists (i would argue so, if i had to pick one! And i recommend this book often). However, if you are in a professional field where this legally matters (EIS or ESA decisions on wolverine/fisher/lynx, etc.), take heed: the authors’ methods of measuring tracks are confusing (i.e. - where is the line between substrate/mammal family to determine when claws or ‘posterior’ pads are or are not used in measuring tracks? ) Also, the claim that “an individual animal can show incredible variation in track size” (p.57) is very misleading… Foot size of an individual animal from birth to adult will obviously change, but will not change in a day for the same-aged individual animal regardless of whether it walks in mud or atop rock. The animal’s foot does not change in size, but its track might appear to. This perceived “change” could be easily avoided by using minimum outline measurements (which are not discussed in this book, but can be found in the work by J. Halfpenny and others). I understand their reasons, but please do not refer to this book for legally defensible measuring techniques of rare species!!!!
Also please disregard the negative reviewer who said “it’s a very Mythological Approach to how animals move and walk (jsopel),”- they clearly don’t know what that word means…
All in all a well-researched and fantastic book that comes from ample and legitimate experience. A great book and happy tracking!
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Reviewed in the United States on August 15, 2021
★★★★★ 5
A must have for wildlife lovers
Format: Paperback
Wow! What an excellent and thorough compilation of scat and tracks. Nice reference for when you take pics and bring the image back to the book for comparison. Also, great information about tracking.
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Reviewed in the United States on June 10, 2025
★★★★★ 4
Good but index needs improvement
Format: Paperback
This is a good, comprehensive guide to tracks and sign.
However, there is no index of where to find each family, so in order to find a species you have to flip through the entire book looking for the right page. This makes it annoying to use if you are trying to look up information on a particular species or family.
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Reviewed in the United States on April 2, 2026