1. Basic working principle

When switch SW1 is closed, current flows out from the power supply VIN, and the path is: VIN→L1→SW1→GND. At this time, the induct-or stores magnetic energy (the current gradually increases), and the capacitor C2 supplies power to the load (maintaining the VOUT voltage).

When SW1 is turned off, the current in the induct-or cannot change suddenly. In order to maintain the current size, an induced electromotive force (polarity is negative on the left and positive on the right) is generated at both ends of the induct-or. The induct-or voltage is superimposed in series with the power supply voltage, charging the capacitor C2 through the diode D1, and supplying power to the load at the same time. At this time, the VOUT voltage is raised to a level higher than VIN.

When SW1 is closed again, the diode D1 is cut off due to reverse bias, preventing the capacitor C2 from discharging through SW1. The capacitor C2 can only pass through the load at a rate determined by the RC time constant, thereby maintaining the stability of the output voltage VOUT. By adjusting the duty cycle of the switch tube (the ratio of the on time to the cycle), the induct-or continuously stores and releases energy, and the capacitor continues to charge and discharge, and finally a stable boost effect is obtained at the output end (VOUT > VIN).

2. Key parameters of circuit design

2.1 Selection and calculation of induct-or

In the BOOST boost circuit, the selection of induct-or is crucial to the circuit working mode, output voltage stability and efficiency. The inductance value and saturation current should be considered in particular: the inductance value determines the current change rate. If it is too high, the startup time will be prolonged. If it is too low, the current may drop to zero quickly when the switch element is turned off and enter the discontinuous conduction mode (DCM); the saturation current of the induct-or must be greater than the maximum current (including steady-state peak current and transient spike current) when the circuit is working normally to prevent saturation from causing inductance performance degradation and causing over current and other faults.

The calculation of the inductance value is usually based on the following formula (∆IL is the change in induct-or current). The actual value should be 30%-50% larger than the theoretical value to leave enough design margin:

2.2 Selection and calculation of output filter

In the BOOST boost circuit, the output filter plays a key role in filtering out switching noise and maintaining output voltage stability. The typical output filter consists of an output capacitor and a sensing resistor. The main parameter selection points are as follows: The output capacitor capacity needs to determine the minimum capacity based on the required ripple voltage to suppress voltage fluctuations through sufficient charging and discharging capacity; the lower the equivalent series resistance, the better the filtering effect and the longer the capacitor life, which can effectively reduce the high-frequency component in the ripple voltage; the sensing resistor value needs to be as small as possible to achieve accurate measurement of the output current while reducing power loss and balancing measurement accuracy and energy efficiency.

The calculation formula for the output capacitor is (∆VOUT is the allowable ripple of the output voltage). The actual value should be 30%-50% larger than the theoretical value to leave enough design margin:

3. Working mode

Depending on whether the induct-or current is continuous, the BOOST circuit can be divided into the following three working modes:

3.1 CCM continuous conduction mode

Its working characteristics are: the induct-or current is always greater than zero during the entire switching cycle, which is suitable for large load current scenarios and has high efficiency.

The working process is: when the switch is turned on, the diode is reverse biased and cut off, the input power charges the induct-or, the induct-or current increases linearly, and the load is powered by the output capacitor; when the switch is turned off, the induct-or discharges to the load and capacitor through the diode, the induct-or current decreases linearly but remains positive, and the output capacitor is charged at the same time, and its voltage conversion relationship is Vout = Vin / (1 – D) (D is the duty cycle, the value range is 0 < D < 1).

The conditions that need to be met are:

3.2 BCM critical conduction mode

Since the induct-or current has dropped to zero before the switch tube is turned on, zero current switching (ZCS) can be achieved, effectively reducing switching losses and having certain advantages in improving circuit efficiency and reliability.

The conditions that need to be met are:

3.3 DCM discontinuous conduction mode

Its working characteristics are: the induct-or current will drop to zero in each switching cycle, which is suitable for light load or low current conditions, and the control characteristics are highly nonlinear.

Its working process is: the switch-on stage is the same as the CCM mode, the input power supply charges the induct-or to make the induct-or current rise linearly, and the load is powered by the output capacitor; in the switch-off stage, the induct-or discharges to the load and capacitor through the diode, the induct-or current drops linearly to zero, and then the diode is cut off, and the load is completely powered by the output capacitor; in the zero current stage, the induct-or current remains zero until the next cycle begins. This mode can avoid the efficiency drop problem that may occur in the CCM mode when light load, but the nonlinear control characteristics require higher circuit design accuracy.

The conditions that need to be met are:

A small pool can be just as tiring to clean as a big one if you do it by hand. A quality robot pool cleaner is a worthwhile investment for pools up to 850 square feet. Features & detailsFast Installation: Smartstick 52 inInstallation for 8 ft.or 10 ft.exe. 1 or 2 doors. These portable, cordless units are great for keeping a smaller backyard residential pool mobile and effectively covered.

Why Should You Use a Cordless Robotic Pool Cleaner?

This rugged robotic pool cleaner offers two cleaning levels: the cordless model is hard to beat for smaller pool dimensions. They’re also lightweight, compact and don’t need an external power source or hoses. There are no cords for you to untangle or manage underfoot and the cleaner navigates around objects such as ladders, furniture and trees in your space, reaching every corner of the pool even around tight corners and near the skimmer.

The pool cleaners also don’t require a pool booster pump, so installation is a breeze and perfect for the everyday pool owner or seasonal swimmers.

Best options for Small Pools

What to look for in a pool vacuum robot for a small pool When picking a pool vacuum robot for a small pool you should consider:

Smaller Size: Easier to mount and dismount with smaller models.

Rapid Charge: You want a pool vacuum with between a 2–3 hour charge time.

Battery life: most small pool robots have a lifespan of 60–90 minutes, great for a pool under 850 sq. ft.

Smart Navigation: Path planning API mimics human navigation, learns and covers area more efficiently and more thoroughly.

Wall Climbing Pool Cleaner Feature: The walls would be scrubs very well even in small pools.

When it comes to your list of the best, elite Beatbot AquaSense 2 Ultra is the premium choice, but that’s not to say that the beatbot AquaSense 2 Pro and beatbot AquaSense 2 are also good ones to check out. Designed with small-to-medium pools in mind, they offer strong suction, fine filtration and full coverage—all without the hassle of cords.

Algae and Debris Removal performance

Rather a common question is: can a pool robot remove algae? Yes—the current crop of pool-cleaning robots can even defeat light algae growth. For more troublesome cases, you’ll want to rely on manual scrubbing, or use specialized tools, such as a pool vacuum for algae.

For instance, if you have to cope with persistent algae problems, you might be interested in learning how to acid wash pool / how to drain an inground pool without a pump, particularly when you’re involved with end-of-season cleaning ups.

Considerations on Maintenance and Brand

When you are buying in terms of service support and reliability, stick with known quantities like Maytronics pool cleaner and Beatbot. Be sure the swimming pool robot cleaner you choose comes with washable filters, easy-to-empty debris trays and automatic cleaning cycles.

What’s the Bottom Line? Best Choice for Small Pool Owners

Conclusion A robot pool cleaner engineered for pools up to 850 ft². ft. is absolutely worth it. These non-electric versions do the job with none of the bulk of the electric variety, making it so homeowners can have a clean, unalike pool whenever they want while saving money.

The best electric pool heater models like the Beatbot AquaSense 2 Ultra, Beatbot AquaSense 2 Pro and Beatbot AquaSense 2 demonstrate how intelligent design can streamline even the tiniest backyard installations. Whether you’re fighting debris, sparkling your pool, or reducing maintenance, the cordless robot pool cleaner is always relaxed.

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