The planetary winds that blow from the subtropical high- pressure belts to the Equator are known as—

Planetary winds are permanent wind systems that blow from high-pressure belts to low-pressure belts across the globe. The winds that blow from the subtropical high-pressure belts (horse latitudes) toward the equatorial low-pressure belt are known as trade winds [3]. Due to the Coriolis effect, these winds are deflected to the right in the Northern Hemisphere, becoming the Northeast Trade Winds, and to the left in the Southern Hemisphere, becoming the Southeast Trade Winds [2]. These winds are part of the Hadley Cell circulation [1]. In contrast, westerlies blow from the subtropical highs toward the sub-polar lows, while polar winds blow from polar highs toward sub-polar lows. The doldrums refer to the calm, low-pressure zone at the equator where the trade winds converge [4].

Sources

1. [2] Certificate Physical and Human Geography , GC Leong (Oxford University press 3rd ed.) > Chapter 14: Climate > Pressure and Planetary Winds > p. 139
2. [3] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 23: Pressure Systems and Wind System > The Trade Winds > p. 319
3. [1] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 23: Pressure Systems and Wind System > Hadley Cell > p. 317
4. [4] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 23: Pressure Systems and Wind System > Equatorial Low-Pressure Belt or 'Doldrums' > p. 311